All 8 Uses

however
in
Enrique's Journey
(Auto-generated)

The reality, however, is that it takes years and years until the children and mothers are together again.†
Chpt Prol.

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.
Quietly, however, one of these conversations plants the seed of an idea.†
Chpt 1
All of this is nothing, however, against Enrique's longing for his mother, who left him behind eleven years ago.†
Chpt 3
Except in extraordinary circumstances, Mexican immigration agents are barred from carrying firearms. According to a retired agent, however, most have .38-caliber pistols.
Chpt 3 *

however = though (used to connect contrasting ideas)
Can you give me a ride however far north you are going?
Chpt 4 *

however = the amount
Lozano doubts, however, that even his corrupt officers would pick poor migrants to rob.†
Chpt 5

however = a word used to connect contrasting ideas as when using though, in spite of that, in contrast, nevertheless, etc.
The next afternoon, however, their love prevails.†
Chpt 6
Corrections Corporation of America has denied allegations that the children in its custody were not adequately fed; however, the jail in Liberty, Texas, operated by Corrections Corporation of America no longer houses immigrant children.†
Chpt notes

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?"