He'll is a contraction of two parts of speech, he (pronoun) and will (auxiliary verb).
President Harry Truman gave a speech attacking the Republicans. During the speech a supporter yelled "Give 'em Hell, Harry!". Truman replied, "I don't give them Hell. I just tell the truth about them and they think it's Hell."
part of speech
The part of speech for this particular word is a noun.
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
The part of speech for "explicit" is an adjective.
The part of speech for "twirl" is a verb.
The part of speech for "unfamiliar" is an adjective.
The part of speech of "came" is a verb.
The part of speech for "lecturer" is a noun.
The part of speech for "indefinite" is an adjective.