All 7 Uses

however
in
The Immortal Life of Henrietta Lacks
(Edited)

Soon, however, Day's running around was the least of Henrietta's worries.
Chpt 1.5

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.
"The patient states that she feels fairly well," one doctor wrote in her chart, "however she continues to complain of some vague lower abdominal discomfort."
Chpt 1.8 *

however = in whatever way
I hope that some of this hullabaloo over tissue culture has at least had a few good points which have helped others … I wish for the most part, however, that things would settle down a bit.
Chpt 2.13

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.
We must, however, withhold the name of the patient.
Chpt 2.14
However, I do believe that in the kind of article I am projecting there would be complete protection of the rights of all individuals.
Chpt 2.14 *
It is known, however, that at least some of these are from Caucasians, and that at least one, HeLa, is from a Negro.
Chpt 2.20
Moore, however, couldn't sell the Mo cells because that would have violated Golde's patent.
Chpt 3.25

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?"