a person who makes a bid

person with whom one competes

contradicting

antagonistic

opposite to something

antagonistic; opposite

opposite to something

opposite, opposing

an enemy

person who is an opponent

being or appearing unfriendly

antagonistic, mean

a person engaged in a lawsuit

person with whom one competes

expressing 'no', 'not', a refusal; lacking commitment, enthusiasm; (of number or amount) less than zero

bad, contradictory

a person against whom one fights, struggles, plays games, contests an election or argues

person with whom one competes