the.com/silent letter

means A letter written in a word but not pronounced when you say it aloud, like the 'k' in 'knife' or the 'b' in 'lamb'.

from Not from one tidy source but from centuries of language layering: English kept spellings from Old English, French, Latin, and Greek even as pronunciation kept drifting. The 'k' in 'knife' and 'knight' used to be sounded in Old English — people really said the k — but speech simplified while spelling stayed frozen in place. Other silent letters were added later by scribes trying to show off a word's (sometimes invented) Latin pedigree, like the 'b' stuffed into 'debt' and 'doubt' to echo Latin 'debitum' and 'dubitare', even though no one ever pronounced it in English. So the silence isn't one story — it's spelling refusing to let go of the past.