Sentence:  Suspended by the blast which blew <WSD>amain</WSD>, / Shouldering the naked crag, oh at that time, / While on the perilous ridge I hung alone, / With what strange utterance did the loud dry wind / Blow through my ears! 
Meaning of the word marked with <WSD> tags:  With all one's might; forcefully, violently; mightily. (from 16th c.)