愣头愣脑

愣頭愣腦
lèngtóulèngnǎo
  1. rash
  2. impetuous
  3. reckless

CEDICT

  1. rash; hotheaded; reckless
  2. slow in movement; obtuse; stunned

Wiktionary

  1. 粗鲁冒失的样子。如：「这孩子愣头愣脑的，居然把父亲心爱的花瓶摔破了。」也作「愣头磕脑」。
  2. 痴呆的样子。如：「这人看起来愣头愣脑的，大概受过什麽刺激吧！」也作「愣头磕脑」。

重編國語辭典

Entry Composition

1 愣 lèng
  1. to look distracted
  2. to stare blankly
  3. distracted
  4. blank
  5. (coll.) unexpectedly
  6. rash
  7. rashly
=2 头 tóu
  1. head
  2. hair style
  3. the top
  4. end
  5. beginning or end
  6. a stub
  7. remnant
  8. chief
  9. boss
  10. side
  11. aspect
  12. first
  13. leading
  14. classifier for pigs or livestock

classifier: 個
=2 头 tou suffix for nouns
3 愣 lèng
  1. to look distracted
  2. to stare blankly
  3. distracted
  4. blank
  5. (coll.) unexpectedly
  6. rash
  7. rashly
4 脑 nǎo
  1. brain
  2. mind
  3. head
  4. essence

Related entries

冒失 màoshi
  1. rash
  2. impudent
操切 cāoqiè
  1. rash
  2. hasty
狂躁 kuángzào
  1. rash
  2. impetuous
  3. irritable
疹子 zhěnzi rash
二杆子 èrgānzi
  1. hot-tempered
  2. rash
  3. hot-tempered person
孟浪 mènglàng
  1. hasty
  2. rash
  3. impetuous
狷 juàn
  1. impetuous
  2. rash
  3. upright (character)
疹 zhěn
  1. measles
  2. rash
造次 zàocì
  1. (literary) hurried
  2. rash
二愣子 èrlèngzi
  1. stupid person
  2. dolt
  3. rash (slang)
匆遽 cōngjù
  1. hurried
  2. impetuous
  3. rash
率 shuài
  1. to lead
  2. to command
  3. rash
  4. hasty
  5. frank
  6. straightforward
  7. generally
  8. usually
拿破崙率軍到俄羅斯。

Napoleon led his troops to Russia.

Source: Tatoeba

妄 wàng
  1. absurd
  2. fantastic
  3. presumptuous
  4. rash
你不可以妄下結論。

You must not jump to conclusions.

Source: Tatoeba

狷 juàn
  1. nimble
  2. variant of 狷 juàn
  3. impetuous
  4. rash
愣 lèng
  1. to look distracted
  2. to stare blankly
  3. distracted
  4. blank
  5. (coll.) unexpectedly
  6. rash
  7. rashly
急躁 jízào
  1. irritable; irascible
  2. impetuous
急于求成 jíyúqiúchéng
  1. anxious for quick results (idiom); to demand instant success
  2. impatient for result
  3. impetuous
气盛 qìshèng
  1. red-blooded
  2. full of vim
  3. impetuous
浮 fú
  1. to float
  2. superficial
  3. floating
  4. unstable
  5. movable
  6. provisional
  7. temporary
  8. transient
  9. impetuous
  10. hollow
  11. inflated
  12. to exceed
  13. superfluous
  14. excessive
  15. surplus
花瓣浮在水面上。

The petals are floating on the water.

Source: Tatoeba

恣睢 zìsuī
  1. (literary) reckless
  2. unbridled
  3. self-indulgent
  4. conceited
  5. overly pleased with oneself
胆大包天 dǎndàbāotiān
  1. reckless
  2. extremely daring
放诞 fàngdàn
  1. untrammeled
  2. reckless
  3. wanton
满不在乎 mǎnbùzàihu
  1. not in the least concerned (idiom)
  2. reckless
  3. couldn't give a damn about it
  4. unperturbed
  5. couldn't care less
  6. harum scarum
胡 hú
  1. non-Han people, esp. from central Asia
  2. reckless
  3. outrageous
  4. what?
  5. why?
  6. to complete a winning hand at mahjong (also written 和 hú)
志明真的很扯，每次打麻將都胡最後一把。

Chih-ming’s insane — he always wins the last round in mahjong.

Source: Tatoeba

胡乱 húluàn
  1. careless
  2. reckless
  3. casually
  4. absent-mindedly
  5. at will
  6. at random
  7. any old how
他胡亂把書本放在架上。

He put the books on the shelf out of order.

Source: Tatoeba

胡天胡帝 hútiānhúdì
  1. with all the majesty of an emperor (idiom)
  2. reckless
  3. intemperate
冒 mào
  1. to emit; to give off; to send out (or up, forth)
  2. to brave; to face
  3. (bound form) reckless
  4. to falsely adopt (sb's identity etc); to feign
  5. (literary) to cover
我不想冒這個險。

I don't want to take the chance.

Source: Tatoeba

恣意 zìyì
  1. without restraint
  2. unbridled
  3. reckless
蛮干 mángàn
  1. to act rashly
  2. to act precipitously regardless of the consequences
  3. reckless
  4. foolhardy
  5. daredevil
轻率 qīngshuài
  1. cavalier
  2. offhand
  3. reckless
轻 qīng
  1. light
  2. easy
  3. gentle
  4. soft
  5. reckless
  6. unimportant
  7. frivolous
  8. small in number
  9. unstressed
  10. neutral
  11. to disparage
轻一点儿放！

Put it down lightly!

Source: Tatoeba

蛮 mán
  1. barbarian
  2. bullying
  3. very
  4. quite
  5. rough
  6. reckless
這兒蠻吵的。

There's a lot of noise here.

Source: Tatoeba

混 hùn
  1. to mix
  2. to mingle
  3. muddled
  4. to drift along
  5. to muddle along
  6. to pass for
  7. to get along with sb
  8. thoughtless
  9. reckless
油和水不能混在一起。

Oil does not mix with water.

Source: Tatoeba