The word for the omission of a sound in speech is "elision." Elision refers to the removal or omission of certain sounds or syllables in spoken language, often to aid in pronunciation or to make speech more fluid.
part of speech
The part of speech for this particular word is a noun.
An omission is when something is left out.
adverb
what part of speech is work
what part of speech is beneath
The omission of his name from the movie credits is regrettable. He lied by omission when he failed to say that he had in fact been there that night. It was an omission to not give the winner a prize.
leave words out of a quote. An ellipsis is used for the omission from speech or writing of a word or words that are superfluous or able to be understood from contextual clues.
Sashay is a verb. It means to walk in an exaggerated, showy manner, often with hip swaying.
"Did not" or "didn't" is a contraction of the auxiliary verb "did" and the adverb "not," forming a negative past tense construction in English.
Adjective