(adjective) opposed, contrary, reverse, hostile, opposing, adverse, counter, unfriendly, unfavorable, repugnant, preventive, perverse, inconsistent, repulsive, incompatible or inimical (noun) fight, resistance, opposition, match, conflict, joust, combat, odds, warfare, contest, strife, tilt or no (adverb) con, athwart or aversely (prefix) contra-