adversari aliquem (not alicui); repugnare; adversum esse alicui (general term); resistere (of a party attacked): obsistere (of a party attacking); obniti, rarely reniti se opponere, obviam ire. To oppose an enemy, hosti se opponere, obviam ire, repugnare; hostem propulsare; defendere: to oppose the opinions of others, aliorum opinionibus obsistere: to be opposed; to oppose (in argument, etc.), contra aliquem dicere, disserere, disputare (Cic.); adversario respondere (Quint., 70, 7, 3); obesse; obstare (to hinder); repugnare alicui rei or contra aliquid (to be repugnant, not in unison; then also = to hinder): obniti, obluctari (to strive against): to be opposed to anybody in a matter, repugnare alicui in re: I am not opposed, per me licet; nihil impedio, non repugnabo (Vid: Zumpt, § 543, sq.): to be opposed to each other, repugnare inter se (of two things): obtrectare inter se (of two rivals).