feckless -- Isabella

feck·less  (fkls) adj. 1. Lacking purpose or vitality; feeble or ineffective. 2. Careless and irresponsible. [Scots feck, effect (alteration of effect) + -less.] feckless·ly adv. feckless·ness n.

The American Heritage® Dictionary of the English Language, Fourth Edition copyright ©2000 by Houghton Mifflin Company. Updated in 2009. Published by Houghton Mifflin Company. All rights reserved.

Isabella is no feckless teenager: she is wise beyond her years.