Definitions

1. consonant

a type of sound in speech, made by obstructing airflow with the tongue or teeth

“The sound of the ‘ch’ in the word ‘chill’ is an example of a consonant.”

2. interjection

an expression of strong emotion or surprise

“Ch, that’s a great idea!”

3. prefix

a letter or group of letters added to the beginning of a word to form a new word

“The prefix ‘ch’ in the word ‘chair’ comes from the Old English word ‘cæir’.”

4. verb

to make a harsh, hissing sound

“The water ch in the pipe.”