搞 Gǎo, basic meaning-do.
他在搞什么？What is he doing? (something bad)
Other meanings:
causing
e.g.病毒搞得全世界停摆了。Pandemic causes world-while shutdown.
making, engaging
e.g. 小王和小孙在搞对象。Wang and Sun are falling in love.
stealing
e.g. 他不知在哪搞了一辆自行车。He got a bicycle from somewhere.
having affair with, rape
e.g. 那家伙风流成性，到处搞女人。That guy is a sex addict, and has affair with many women.
他在搞什么？What is he doing? (something bad)
Other meanings:
causing
e.g.病毒搞得全世界停摆了。Pandemic causes world-while shutdown.
making, engaging
e.g. 小王和小孙在搞对象。Wang and Sun are falling in love.
stealing
e.g. 他不知在哪搞了一辆自行车。He got a bicycle from somewhere.
having affair with, rape
e.g. 那家伙风流成性，到处搞女人。That guy is a sex addict, and has affair with many women.
difficult to deal with
e.g. 这个人很难搞。 This person is difficult to deal with.
e.g. 这个人很难搞。 This person is difficult to deal with.