ty ‧ phoon /ˌtaɪˈfuːn◂/ BrE AmE noun [countable]
[ Date: 1800-1900 ; Origin: touffan 'typhoon' (16-19 centuries) , from Arabic tufan 'hurricane' , from Greek typhon 'whirlwind' ; influenced by Chinese daai fong 'great wind' ]
a very violent tropical storm