Clauses meaning "although" or "even if": etiamsi, etsi, tametsi, quamquam, quamvis, licet, and cum with the subjunctive; the main clause often has tamen.
etiamsi, etsi, tametsi "even if, although" follow the rules of si clauses: Etiamsi … victurus esses "even if you were going to live" (unreal, imperfect subjunctive).
quamquam + indicative "although" states a fact; quamvis and licet + subjunctive mean "however much, although".
cum + subjunctive can mean "although" or "whereas", setting two facts against each other: cum is sponte sua … feratur "whereas the other rushes of his own accord".
tamen "yet, still, nevertheless" in the main clause confirms the concession: illud tamen meminisse debes "you must still remember this".