obwohl
although
Introduces a subordinate clause that states a counter-reason or an unexpected fact that contrasts with the main clause.
Obwohl er müde war, hat er den Film zu Ende geschaut.
Although he was tired, he watched the film to the end.

although
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although
Introduces a subordinate clause that states a counter-reason or an unexpected fact that contrasts with the main clause.
Obwohl er müde war, hat er den Film zu Ende geschaut.
Although he was tired, he watched the film to the end.

The word 'obwohl' (although) is made up of 'ob' and 'wohl'. This combination expresses a contrast or an unexpected counter-reason, in the sense of 'even if that is the case'.
Obwohl es regnete, machten wir einen Spaziergang.
Although it was raining, we went for a walk.
'Obwohl' (although) introduces a subordinate clause. This means the conjugated verb always comes at the end of the 'obwohl' clause.
Ich gehe zur Arbeit, obwohl ich mich nicht gut fühle.
I'm going to work although I don't feel well.
The 'obwohl' (although) clause can come before or after the main clause. If the subordinate clause comes first, the main clause begins directly with the verb.
Er kam zu spät, obwohl er früh losgefahren ist.
He arrived late although he left early.
also / even
'auch wenn' and 'obwohl' can both express a contrast: a fact actually speaks against something, but the action happens anyway. 'obwohl' is the normal conjunction for this kind of contrast. 'auch wenn' often sounds a bit more like a condition or possibility: even in this case, the statement remains true. Learners confuse them because both are used with subordinate clauses and have a similar idea. In many everyday sentences, 'obwohl' fits for a real fact, while 'auch wenn' works well for a possible or emphasized opposing reason.

Er ist am Wochenende verreist, obwohl er heute sehr müde war.
He went away for the weekend, although he was very tired today.
Moritz kommt morgen mit, auch wenn er wenig Zeit hat.
Moritz is coming along tomorrow, even if he has little time.