DEFEND

Argue or speak in defense of

Example: "She supported the motion to strike"

Be on the defensive; act against an attack

Protect against a challenge or attack

Example: "Hold that position behind the trees!"

Fight against or resist strongly

Example: "The senator said he would oppose the bill"

Protect or fight for as a champion

Be the defense counsel for someone in a trial

Example: "Ms. smith will represent the defendant"

State or assert

Example: "He maintained his innocence"