All 9 Uses

however
in
Education of Little Tree
(Auto-generated)

He said, however, he had seen a doe deer one time, that was in heat and couldn't find a buck, go slap-dab mad, running into trees and finally drowning herself in the creek.
Chpt 3.

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.
However, there is a right smart bit of work to it.
Chpt 12.
Poke salat berries, however, are poison and they will knock you deader than last year's corn stalk.
Chpt 12.
This time, however, Granpa nearly got killed too.
Chpt 12.
Mr. Chunk and Mr. Slick, however, was in fine spirits.
Chpt 14.
I had, however, come out a dollar ahead.
Chpt 14.
Granpa, however, didn't need an almanac.
Chpt 15.
Some of the womenfolks, however, crowded around her and beat her on the back and patted her and told her she had done the right thing.
Chpt 16. *
I told him however, that ol' Ringer died.†
Chpt 19.

Definitions:

(1) (however as in: However, complications may...)
though (or another expression that connects contrasting ideas)

Based on idea 1 we might not expect idea 2, but this is a way of saying that even though idea 1 exists, we still have idea 2. Synonyms include in spite of that, despite that, nevertheless, nonetheless, on the other hand, in contrast and but.
(2) (however as in: However much she tried...)
to whatever degree (regardless of how much; or whatever unspecified amount)
(3) (however as in: However you do it, get it done!)
in whatever way
(4) (meaning too rare to warrant focus)
Much more rarely (and arguably incorrectly), however can be used to intensify the word how, as when one says "However did you find her?" Grammarians would suggest using two words for that usage: "How ever did you find her?"