Verb (5-dan, う, intransitive)
1. to compete; to contest; to contend
先を争うように、他の部隊も動き出した。As if competing to be first, the other units also began to move.
2. to quarrel; to argue; to dispute; to be at variance; to oppose
ここで争ってはなりません！You must not quarrel here!
3. to deny (e.g. evidence)
usu. in negative form
実力の差は争えない。There's no denying the difference in ability.