愣头愣脑

Traditional form:

愣頭愣腦

Pinyin (reading):

lèngtóulèngnǎo

Definitions:

• rash
• impetuous
• reckless

Characters:

• 愣 - dazed, stupefied
• 头 - head; chief, boss; first, top
• 愣 - dazed, stupefied
• 脑 - brain

Traditional characters:

• 愣 - dazed, stupefied
• 頭 - head; chief, boss; first, top
• 愣 - dazed, stupefied
• 腦 - brain