Off can be used as an adverb, preposition, adjective, or verb.
part of speech
Adjective
What part of speech is thaw
The part of speech for oscillate is verb.
The word 'door' is a noun, a word for a movable structure used to close off an entrance or a part of a piece of furniture; a word for a thing.
it is ADVERB.
preposition
phrasal verb
yes
When a person refers to something that has died-off or dies-off, they commonly use it as a verb
Adjective, because off is describing the tv, a noun (thing), and comes after is, a verb (action).
A verb, as in "Copying answers blindly off the Internet may disqualify you."
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