This is the 10731st most frequent Russian word.
воюет
"Is at war" or "fights."
The verb 'воюет' here indicates active participation in armed conflict, showing the effort to defend one's nation.
Он воюет за свою страну.
He fights for his country.
In this context, 'воюет' conveys a metaphorical struggle or effort pursued for a noble cause such as justice.
Она воюет за справедливость.
She fights for justice.
This usage of 'воюют' suggests a competitive effort between parties aiming to achieve a goal, used idiomatically.