Part of speech: Adverb
(of actions or states) slightly short of or not quite accomplished
Example: all but; the job is (just) about done; the baby was almost asleep when the alarm sounded; we're almost finished; the car all but ran her down; he nearly fainted; talked for nigh onto 2 hours; the recording is well-nigh perfect; virtually all the parties signed the contract; I was near exhausted by the run; most everyone agrees
Most, Well-nigh, Almost, Nigh, Nearly
The word "almost" comes from Old English eallmǣst.
al – A related word in the same word family.
most – A related word in the same word family.
Old English poetry used alliteration rather than rhyme, influencing how compound words formed.