彼はアルコールを一切飲まない。

he; him; his; boyfriend

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

alcohol

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

all; everything; the whole; lock, stock, and barrel; absolutely not (with negative); without exception; entirely not

to drink; to gulp; to swallow; to take (medicine); to smoke (tobacco); to engulf; to overwhelm; to keep down; to suppress; to accept (e.g. demand, condition); to make light of; to conceal