合法ごうほうてき
gō hōteki

na-Adjective

1. legal; lawful; legitimate; law-abiding; in order

あなたは合法ごうほうてき手段しゅだん行動こうどうするほうがよい。
anatawa gōhōteki shudande kōdō suru hōga yoi.
It is better for you to act by legal means.