however in WordNet English dictionary

1. despite anything to the contrary (usually following a concession)
   "although I'm a little afraid, however I'd like to try it"; "while we disliked each other, nevertheless we agreed"; "he was a stern yet fair master"; "granted that it is dangerous, all the same I still want to go"
   however  nevertheless  withal  still  yet  all the same  even so  nonetheless  notwithstanding  however  nevertheless  withal  still  yet  all the same  even so  nonetheless  notwithstanding 
   
2. in whatever way or manner
   "Victory, however it was brought about, was sweet"; "however he did it, it was very clever"
   however  however 
   
3. to whatever degree or extent
   "The results, however general, are important"; "they have begun, however reluctantly, to acknowledge the legitimacy of some of the opposition's concerns"
   however  however 
   
4. by contrast; on the other hand
   "the first part was easy; the second, however, took hours"
   however  however