Strive
riyb (reeb)
to toss, i.e. grapple; mostly figuratively, to wrangle, i.e. hold a controversy; (by implication) to defend
not with a man
'adam (aw-dawm')
ruddy i.e. a human being (an individual or the species, mankind, etc.) -- another, + hypocrite, + common sort, low, man (mean, of low degree), person.
without cause
chinnam (khin-nawm')
gratis, i.e. devoid of cost, reason or advantage -- without a cause (cost, wages), causeless, to cost nothing, free(-ly), innocent, for nothing (nought, in vain.
if he have done
gamal (gaw-mal')
to treat a person (well or ill), i.e. benefit or requite; by implication (of toil), to ripen, i.e. (specifically) to wean
thee no harm
ra` (rah)
bad or (as noun) evil (natural or moral)one), worse(-st), wretchedness, wrong. (Incl. feminine raaah; as adjective or noun.).