All 10 Uses

although
in
We Beat the Street
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He never let on how mad he was at Eddie, although he had already decided to forgive him.†
Chpt 7

although = even though -- used to connect contrasting ideas
Although I can recall almost nothing about that test, it was another turning point in my life.†
Chpt 8
I don't really remember that Sam and I sat together, although we certainly could have.†
Chpt 8
Although most students began the advanced academic program in the seventh grade, Rameck had transferred to University High School in the ninth grade.†
Chpt 9
"Seton Hall University," she continued, "is dedicated to training more minority students to enter medicine, not as aides and orderlies, although those are important jobs, but as doctors!"†
Chpt 12
Each of them mentioned the other two in their interviews, although none of them knew it at the time.†
Chpt 15 *
Soon," Rameck promised, although he didn't have the slightest idea how they could accomplish that goal.†
Chpt 18
When it came time to make the decision about what to do with the rest of our lives, the three of us realized that although the music business was alluring and exciting, the dental and medical professions we had chosen were solid paths that would support us well for the rest of our lives.†
Chpt 18
Our families, although supportive, could not possibly understand the pressures we lived with.†
Chpt 19
Rameck asked, although he had a pretty good idea of what Sam would tell him.†
Chpt 21

Definitions:

(1) (although)
even though -- used to introduce an idea that contrasts with or makes the main statement surprising

At the start of a sentence, although can play a role similar to words like however, yet, still, even so, on the other hand, or nonetheless—all of which signal contrast. In the middle of a sentence, although can sometimes be used where but or though might also work, but though or but often sound more natural. For example, "She's a great teacher, though not the most popular" is usually smoother than "She's a great teacher, although not the most popular."
(2) (meaning too rare to warrant focus)