OUT can mean 'Fora', like 'on the outside' ('na parte de fora'), or it can also mean 'sai!' ('get out!'), or it can mean 'Sair', like in 'let's go out' ('Vamos sair'). It can also mean more, but it...
Nothing.
'Who' means nothing in Portuguese, but you can say the pronoun 'who' in Portuguese this way:
Quem.
(pronunciation: 'cane')
e.g. Who are you? = Quem é você?
Who means: Quem
Like Who did...