[adj] given to or characterized by argument; "an argumentative discourse"; "argumentative to the point of being cantankerous"; "an intelligent but argumentative child"
arguing, contentious, disputatious, disputative, litigious, quarrelsome
unargumentative
argumental, belligerent, cat-and-dog, cat-and-doggish, combative, contentious, controversial, dialectic, disagreeable, disputatious, eristic, ill-humored, litigious, logomachic, pilpulistic, polemic, polemical, pro and con, quarrelsome, scrappy, testy