потому что

Etymology

 * See and . A possible English gloss is "by the fact that".

Conjunction

 * 1) because

Usage notes

 * The coordinate question is usually served by.
 * Unlike English, Russian потому что can never govern an introductory clause (e.g. English "Because I was early, I had to wait"). For that, , and other conjunctions must be used. This separation of usage is not general to Russian conjunctions and is rather a peculiarity of a few including this one.