Silent letters are letters in words that are not pronounced when we say the word. They can make spelling and pronunciation a bit tricky.
Silent letters are not always necessary for the meaning of a word, but they are often retained in spelling to reflect a word's origin or history. Some common examples of silent letters include the "k" in "knee", the "b" in "doubt", and the "h" in "hour".
Learning about silent letters can help improve spelling and pronunciation skills in English.