defend

verb

1. argue or speak in defense of"She supported the motion to strike"
2. be on the defensive; act against an attack
3. protect against a challenge or attack"Hold that position behind the trees!"
4. fight against or resist strongly"The senator said he would oppose the bill"
5. protect or fight for as a champion
6. be the defense counsel for someone in a trial"Ms. Smith will represent the defendant"
7. state or assert"He maintained his innocence"