although

Từ điển Oxford Advanced Learner 8th

al·though (also US informal altho)BrE [ɔːlˈðəʊ] NAmE [ɔːlˈðoʊ] conjunction
1. used for introducing a statement that makes the main statement in a sentence seem surprising
Syn: ↑though
• Although the sun was shining, it wasn't very warm.
• Although small, the kitchen is well designed.
2. used to mean ‘but’ or ‘however’ when you are commenting on a statement
• I felt he was wrong, although I didn't say so at the time.

Word Origin:
[although] Middle English: from the adverb ↑all + ↑though.

Language Bank:
however
Ways of saying ‘but’
▪ Politicians have promised to improve road safety. So far, however ▪, little has been achieved.
Despite ▪ clear evidence from road safety studies, no new measures have been introduced.
▪ Politicians have promised to improve road safety. In spite of this ▪ / Despite this ▪, little has been achieved so far.
Although ▪ politicians have promised to improve road safety, little has been achieved so far.
▪ Some politicians claim that the new transport policy has been a success. In fact ▪, it has been a total disaster.
▪ Government campaigns have had a measure of success, but the fact remains that ▪ large numbers of accidents are still caused by careless drivers.
Language Bank at ↑nevertheless

Which Word?:
although / even though / though
You can use these words to show contrast between two clauses or two sentences. Though is used more in spoken than in written English. You can use although, even though and though at the beginning of a sentence or clause that has a verb. Notice where the commas go: ▪ Although/Even though/Though everyone played well, we lost the game. ◇ ▪ We lost the game, although/even though/though everyone played well.
You cannot use even on its own at the beginning of a sentence or clause instead of although, even though or though: Even everyone played well, we lost the game.