madcap

名词 madcap:

1. a reckless impetuous irresponsible person
   同义词：daredevil, hothead, swashbuckler, lunatic, harum-scarum

形容词 madcap:

1. characterized by undue haste and lack of thought or deliberation; (`brainish' is archaic)
   同义词：hotheaded, impulsive, impetuous, tearaway, brainish

mad.cap

adj.（形容词）
Behaving or acting impulsively or rashly; wild.
鲁莽的：举止行为冲动的或鲁莽的；狂乱的

来源：
mad
mad
cap [head]
cap[头]

【引伸】
mad.cap.
n.（名词）