воева́ть

fairly common #3895B2

verbimperfective perfective is повоева́ть

1.
to be at war, to wage war, to fight (in a war)military
Э́ти две страны́ воева́ли мно́го лет.
These two countries were at war for many years.
Imperfective; often with с + instrumental for the enemy.
2.
to fight (against), to battle (with), to quarrel
Студе́нты и пенсионе́ры вою́ют с анте́ннами со́товой свя́зи.
Students and pensioners are fighting against mobile phone antennas.
Figurative: to campaign against something or squabble with someone.

Examples

Том и Мэри постоянно вою́ют.
Tom and Mary fight constantly.
Мно́гие молодые мужчи́ны ушли́ воева́ть.
Many young men went to war.
Никто не хо́чет воева́ть.
No one wants to fight.
Дед часто рассказывал, как воевал с фрицами.
Grandpa often used to tell us how he fought the Fritzes.
Том и Мэри всё вре́мя вою́ют.
Tom and Mary fight all the time.
Воева́ть легче, чем заключа́ть мир.
It's easier to make war than to make peace.
Племена, сосуществовавшие рядом, редко воевали.
The tribes that coexisted side by side rarely fought each other.
Том воева́л во Вьетна́ме.
Tom fought in Vietnam.

Imperative
ты	вою́й
вы	вою́йте

Verb	Prefix	Meaning
воева́ть	-	to be at war; to fight (against)
завоева́ть	за-	to conquer; to win; to win through struggle
навоева́ться	на-	to have had enough of fighting
отвоева́ть	от-	to fight