Silent letters
Year group: 5/6
Source: DfE, English Appendix 1: Spelling, National Curriculum for England (2013) — Years 5–6
Curriculum requirement: Statutory
Purpose: Years 5–6 guide to silent letters — common patterns (kn-, wr-, -mb, -gn), etymological reasons, statutory examples, and practice activities.
The rule
Silent letters are letters that are written but not pronounced. In English, they are almost never random — they are historical records of how the word was once pronounced, or evidence of the word's origin.
The key insight: no letter in English is truly silent without reason. Understanding why a letter is there makes it far easier to remember.
The statutory silent letter groups
b — silent after m and before t
| Word | Meaning | Etymology note |
|---|---|---|
| doubt | to be uncertain | Latin dubitare — the b was in the Latin original |
| debt | money owed | Latin debitum — same Latin b preserved |
| subtle | not obvious; finely detailed | Latin subtilis — the b was in the Latin |
| lamb | a young sheep | Old English lamb — the b was once pronounced in Old English |
| thumb | the short thick finger | Old English þūma — b was added by analogy with lamb, dumb |
| bomb | an explosive device | French bombe — final b kept from French |
| comb | a toothed grooming tool | Old English camb — b once pronounced |
| climb | to go upward | Old English climban — b once pronounced |
| plumb | perfectly vertical | Latin plumbum (lead) — the b is from the Latin |
| dumb | unable to speak; (informal) stupid | Old English dumb — b was once sounded |
| numb | without feeling | Old English niman — b added by analogy |
| crumb | a tiny piece of bread | Old English cruma — b added by analogy |
The rule for mb: In Old English, the mb cluster at the end of words was fully pronounced. Over time, the b became silent, but the spelling was preserved. This is why lamb, bomb, comb, thumb all end in -mb.
The rule for bt: The b in debt and doubt was reinserted by Renaissance scholars who wanted the English spelling to reflect the Latin original (debitum, dubitare). The b was actually NOT in the Old French words (dete, doute) — it was added artificially. Yet it stuck.
k — silent before n
| Word | Meaning | Etymology note |
|---|---|---|
| knight | an armoured warrior | Old English cniht — the k was once fully pronounced |
| kneel | to rest on one's knees | Old English cnēowlian — kn was pronounced |
| knot | a tying of rope | Old English cnotta |
| know | to have knowledge | Old English cnāwan |
| knife | a cutting blade | Old Norse knífr |
| knock | to strike a surface | Old English cnocian |
| knack | a special skill | related to knock |
| knit | to make fabric from yarn | Old English cnyttan |
| knowledge | awareness; learning | Old English cnāwan + -ledge |
The rule for kn: In Old English and Middle English, kn was fully pronounced as two sounds: the k (a velar stop) followed by n. By around 1600, the k had become silent in speech, but spelling had already been standardised. Every kn word is a record of a sound that existed in medieval English.
(Note: this pattern was introduced at Y2 for simple words like know, knock. At Y5/6, deepen with etymology.)
g — silent before n
| Word | Meaning | Etymology note |
|---|---|---|
| gnaw | to bite repeatedly | Old English gnagan — g was once pronounced |
| gnat | a tiny flying insect | Old English gnætt |
| gnome | a mythical creature | Greek gnōmōn via Latin |
| sign | a mark or symbol | Latin signum — the g reflects the Latin |
| signal | a gesture or device for communication | Latin signale — the g is pronounced here (showing the root) |
| design | a plan; to plan artistically | Latin designare |
| foreign | from another country | Old French forain — g inserted by analogy |
| reign | a monarch's rule | Old French reignier, Latin regnare |
| align | to put in a straight line | Old French aligner |
| benign | kind; not harmful | Latin benignus |
| malign | evil; to speak badly of | Latin malignus |
| campaign | an organised effort | French campagne |
The morphological key for gn: The g in sign, design, and align is silent in those words — but it is pronounced in related words: signal, designation, alignment. This shows the g is not arbitrary — it belongs to the root, and resurfaces when the suffix changes the stress. Teach: sign → signal (g sounds), design → designation (g sounds).
w — silent before r and in some other positions
| Word | Sound | Etymology |
|---|---|---|
| wrap | w silent | Old English wrappan — wr was once a distinct sound |
| write | w silent | Old English wrītan |
| wrong | w silent | Old English wrang |
| wrist | w silent | Old English wrist |
| wreck | w silent | Old Norse rek |
| wrestle | w silent | Old English wrǣstlian |
| sword | w silent | Old English sweord |
| answer | w silent in most accents | Old English andswarian |
| two | w silent | Old English twā |
| whole | w silent | Old English hāl |
The rule for wr: Like kn, the wr cluster was a distinct sound in Old English (possibly a consonant cluster where both were articulated). By the 17th century, the w had become silent, but spelling was already standardised.
h — silent in some positions
| Word | Note |
|---|---|
| hour | from French heure — French h is always silent |
| honest | from French honnête |
| honour | from French honneur |
| heir | from French héritier |
| exhaust | the h is silent in some accents |
| vehicle | h often silent in speech |
| white / where / when | wh — in most modern British English accents, wh = /w/ with silent h |
l — silent before certain consonants
| Word | Note |
|---|---|
| calf | Old English cealf — l dropped before f |
| half | Old English healf |
| calm | Old French calme — l silent before m |
| palm | Latin palma |
| psalm | Greek psalmos |
| could | Old English cūðe — l was inserted by analogy with should, would |
| should | Old English sceolde |
| would | Old English wolde |
| folk | Old English folc — l silent before k |
| walk | Old English wealcan |
| talk | Old English talian |
| chalk | Old English cealc |
| yolk | Old English geolca |
| salmon | Latin salmo — l silent in English |
p — silent at start of Greek-origin words
| Word | Note |
|---|---|
| psychology | Greek psykhē (soul) + logos |
| psychiatry | Greek — healing of the mind |
| pneumonia | Greek pneumon (lung) |
| pterodactyl | Greek pteron (wing) |
| psalm | Greek psalmos |
| pseudo | Greek pseudēs (false) |
The pattern: Words beginning with ps-, pn-, pt- come from Greek and the p is silent. Useful to mention in Y5/6 science and history contexts.
n — silent after m
| Word | Note |
|---|---|
| autumn | Latin autumnus — n was once sounded in Latin |
| column | Latin columna |
| solemn | Latin sollemnis |
| hymn | Greek hymnos |
| damn | Latin damnare — n pronounced in damnation |
| condemn | Latin condemnare — n sounded in condemnation |
The morphological key: Like the gn group, the silent n reappears in related words: damn → damnation (n sounds), condemn → condemnation (n sounds), autumn → autumnal (n sounds).
The big teaching principle
No letter is silent without reason. When children ask "why is there a b in debt?" the answer is: because the word comes from Latin debitum and Renaissance scholars put it back. When they ask "why is there a k in know?" the answer is: because in Old English you said it.
Etymology makes silent letters memorable. A silent letter is a clue about where the word has been.
Word sort
Sort by which letter is silent.
Words: lamb · knight · write · debt · gnaw · calm · hour · sign · wrong · autumn · kneel · bomb · foreign · psalm · subtle
| Silent b | Silent k | Silent g | Silent w | Silent l | Silent n | Silent h |
|---|---|---|---|---|---|---|
Dictation sentences
- The knight had to kneel before the solemn ceremony could begin.
- She wrote the answer in the column marked foreign languages.
- There was no doubt that the subtle damage to the lamb's limb was genuine.
- He had to wrap the bomb disposal equipment carefully before moving it.
- The autumn hymn drifted through the calm air as the sun set.
- The sign above the door showed a design from the reign of the old king.
Source: DfE English Appendix 1: Spelling (2013). Etymology references verified against Oxford English Dictionary and Skeat's Etymological Dictionary. The statutory examples given in Appendix 1 are: doubt, island, lamb, solemn, thistle, knight.