amain

amain

(əˈmeɪn) advarchaic or poetic with great strength, speed, or haste[C16: from a-² + main¹]

a•main

(əˈmeɪn)

adv. Archaic. 1. with full force. 2. at full speed. 3. suddenly; hastily. 4. exceedingly; greatly. [1530–40]

Thesaurus

Adv.	1.	amain - at full speed; with great haste; "the children ran down the hill amain"
	2.	amain - with all your strength; "he pulled the ropes amain"