The word "overdraw" refers to the act of withdrawing more money than what is available in an account. Synonyms for "overdraw" include "exceeding the limit", "overspending", "going into the red", and "drawing on credit". These words all convey the idea of using more resources than what is available or allowable. Other synonyms for "overdraw" include "overextend", "max out", "empty out", and "deplete". These words suggest that one has used up all available resources and is now in a state of deficit. Whichever synonym is used, the idea is the same: one has gone beyond what is sustainable or permissible.