1 · Pronunciation
Hear it, see it, say it
knife, write, comb, castle, Wednesday, hour, half, island, receipt, psychology, listen, climb
Homework series · speakers
Silent letters are letters that appear in the spelling of a word but are not pronounced, such as the k in knife, the b in comb and the w in write. Most come from older pronunciations, so they follow patterns you can learn, but a dictionary is always the final check.
1 · Pronunciation
knife, write, comb, castle, Wednesday, hour, half, island, receipt, psychology, listen, climb
Quick answers
Many were pronounced in the past, but speech changed while spelling stayed the same. Others came from the spelling of words borrowed from other languages.
The final e is one of the most common silent letters, as in make and hope. Other very common ones are the k in kn- words, the w in wr- words, the b in -mb words and the h in hour and honest.
Check the pronunciation in a dictionary. It shows the sounds between slashes, and a silent letter will not appear there. Learn the common patterns too.
Both pronunciations are used in British English: /ˈɒfn/ and /ˈɒftən/. Either is fine, so choose one and use it consistently.