How do you say brush in Chinese?
— 刷子 (shuāzi), 刷 (shuā)

Generic synonyms for brush in Chinese
clean乾淨, 干净 (gānjìng)
tail尾巴 (wěibā)
take拿 (ná)
touch接觸, 接触 (jiēchù), 觸摸, 触摸 (chùmō), 摸 (mō), 觸, 触 (chù)
Specialized synonyms for brush in Chinese
rake耙子 (pázi), 耙 (pá)
toothbrush牙刷 (yáshuā)