Amain has 4 different meanings across 1 category:
Adverb
Verb
1
To lower (the sail of a ship, particularly the topsail).
Adverb
1
at full speed; with great haste
"the children ran down the hill amain"
2
with all your strength
"he pulled the ropes amain"
3
With all of one's might; mightily; forcefully, violently.