to attack; to assault; to launch an offensive

to accuse; to censure; to find fault with and criticize others

to study; to specialize in a field of research; to devote oneself to learning

to treat an illness; to cure; to apply medicine; to counteract, as in the phrase 以毒攻毒 yǐ​dú​gōng​dú

(literary) to work on material; to process; to polish or refine, as in the phrase 它山之石，可以攻玉 tā​shān​zhī​shí​kě​yǐ​gōng​yù

(slang) the dominant partner in a same-sex relationship

a Chinese surname