overextend

over- +‎ extend

overextend (third-person singular simple present overextends, present participle overextending, simple past and past participle overextended)

1. To expand or extend to an excessive degree, especially to do so beyond a safe limit.
2. (linguistics, transitive) To apply (a term) to too many referents, by overextension.
3. (chess, transitive) To push a pawn too far, so that it becomes vulnerable to the opponent's attacks.

• overextended