to do; to engage in / to write; to compose / to pretend; to feign / to regard as; to consider to be / to be; to act the part of / to feel (itchy, nauseous etc) / writings; works
(slang) (from Cantonese) to bow out after a long career / to pack it in / (of a gangster, prostitute etc) to get out of the game / (of a business) to cease to operate