(conjunctive) Nevertheless; yet, still; in spite of that. I didn't argue with him; I still think, however, that he is wrong.
To whatever extent or degree. I couldn't cope, however much I worked on it.
(informal) In any way that one likes or chooses; in a haphazard or spontaneous way. However you decide to do it, make sure it's done by tomorrow.
How ever: an emphatic form of how, used to ask in what manner. However did you manage to get him to agree to that?