flighty

形容词 flighty:

1. guided by whim and fancy
   同义词：flyaway, head-in-the-clouds, scatterbrained
2. unpredictably excitable (especially of horses)
   同义词：skittish, spooky, nervous

flight.y

adj.（形容词）
flight.i.er,flight.i.est

Given to capricious or unstable behavior.
古怪的：用以指变化无常的或不稳定的行为
Characterized by irresponsible or silly behavior.
不负责的：带有不负责或愚蠢行为特征的
Easily excited; skittish.
易于激动的；轻浮的

【引伸】
flight.ily
adv.（副词）
flight.iness
n.（名词）