(a.) Apt to argue; given to contention; easily irritated or provoked\ to contest; irascible; choleric.

acrid adverse aggressive antagonistic antipathetic argumental argumentative battling bellicose belligerent bickering bitter bloodthirsty bloody bloody-minded brawling cankered cat-and-dog cat-and-doggish caustic chauvinist chauvinistic choleric clashing colliding combative conflicting contending contentious contestant contesting contrary controversial counter crabbed cranky cross despiteful dialectic disagreeable disputant disputatious dissentient dissentious dissident divisive dyspeptic enemy eristic factional factious ferocious fierce fighting fractious full of fight full of hate grouchy hateful hawkish hostile ill-humored inimical irascible irritable jingo jingoish jingoist jingoistic litigious logomachic malevolent malicious malignant martial militant militaristic military offensive partisan peevish petulant pilpulistic polarizing polemic pro and con pugnacious querulous rancorous repugnant saber-rattling sanguinary sanguineous savage scrappy set against shrewish soldierlike soldierly sore spiteful squabbling striving struggling testy trigger-happy truculent unfriendly unpacific unpeaceable unpeaceful venomous virulent vitriolic warlike warmongering warring wrangling