Improvident

Part of speech: adjective (a.)

Not provident; wanting foresight or forethought; not foreseeing or providing for the future; negligent; thoughtless; as, an improvident man. Improvident soldires! had your watch been good, This sudden mischief never could have fallen. Shak.

Synonyms: Inconsiderable; negligent; careless; shiftless; prodigal; wasteful.