adverb

 

used to say that it does not make any difference how cold/difficult/slowly, etc

We're not going to get there in time, however fast we drive.

 

comparing used when you are about to say something which is surprising compared with what you have just said

He had always been a successful businessman. Recently, however, things have not been going well for him.

 

asking used to ask about how something happened when the person asking feels surprised

However did you manage to persuade her?

 

conjunction

 

in any way

However you look at it, it's still a mess.