Sentence:  And fairly <WSD>couching</WSD> his ſteel-headed Spear, / Him firſt ſaluted with a ſturdy Stroke: / It booted nought Sir "Guyon", coming near, / To think ſuch hideous Puiſſance on foot to bear. 
Meaning of the word marked with <WSD> tags:  To lower (a spear or lance) to the position of attack.