but but /ˈbʌt/

adverb

1. () And nothing more  ( but , simply , merely , just , only )
   and nothing more
    I was merely asking
   I was merely asking
    It is simply a matter of time
   it is simply a matter of time
    Just a scratch
   just a scratch
    He was only a child
   he was only a child
    Hopes that last but a moment
   hopes that last but a moment
   

conjunction

1. () Introduces something in contrast or unexpected; however, on the contrary  ( but )
   introduces something in contrast or unexpected; however, on the contrary
   
2. () Except for, excluding  ( but )
   Except for, excluding