ETYM Latin contentiosus: cf. French contentieux.
1. Inclined or showing an inclination to dispute or disagree, even to engage in law suits; SYN. disputatious, disputative, litigious.
2. Involving or likely to cause controversy.
ETYM Cf. Late Lat. controversialis.
Marked by or capable of arousing controversy.
1. In a state of controversy; in disagreement
2 also in issue; under discussion or in dispute
Disputably, questionably, contestably, dubiously