愣头愣脑

impetuous; rash; reckless

愣的英语翻译：

distracted; rash; stupefied

头的英语翻译：

beginning or end; cobbra; conk; crumpet; end; first; garret; hair; head
leading; nob; noddle; pate; sconce; side; top; twopenny
【医】 capita; caput; cephal-; cephalo-; head; kephal-; kephalo-

脑的英语翻译：

brain; encephalon; pericranium; cerebrum
【医】 brain; encephalo; encephalon