Flightiness – the tendency to change your mind suddenly and be unreliable

(Pronounced fly-tee-ness)

To remember the definition of the word flightiness, use the following mnemonic:

The flying teenagers couldn't care less (flightless). They kept changing direction and couldn't be relied on to follow the safest route. 

Examples of flightiness in a sentence

While she was a talented film director, her flightiness made her difficult to work with. 

She left her boyfriend because she couldn't put up with his flightiness any longer.

Flightiness was one of the few traits he couldn't tolerate.