Some english words have a letter in them which will not make a sound when a word is pronounced. there are some examples here: silent letter find and write out the silent letter: medicine comb kitchen whale

Medicine - первая буква i и последняя буква е -  [ˈmedsɪn]

Comb - последняя буква d - [kəʊm]

Kitchen - буква t -  [ˈkɪʧɪn]

Whale - буквы h и буква е - [weɪl]