clear-headed

形容词 clear-headed:

1. not mentally confused; able to think clearly and act intelligently
   同义词：clearheaded, clear-thinking

clear-head.ed

adj.（形容词）
Having a clear, orderly mind; sensible.
头脑清楚，明事理的；敏锐的

【引伸】
clear.-head.edly
adv.（副词）
clear.-head.edness
n.（名词）