Sentence:  For with ſuch puiſſance and <WSD>impetuous</WSD> maine / Thoſe Champions broke on them, that forſt the fly, / Like ſcattered Sheepe, whenas the Shepherds ſwaine / A Lyon and a Tigre doth eſpye, / With greedy pace forth ruſhing from the foreſt nye. 
Meaning of the word marked with <WSD> tags:  Characterized by sudden violence or vehemence.