不知輕重

不知轻重
bùzhīqīngzhòng
  1. lit. not knowing what's important (idiom); no appreciation of the gravity of things
  2. naive
  3. doesn't know who's who
  4. no sense of priorities

CEDICT

不知事情的輕重，有冒昧的意思。

重編國語辭典

不知事情的輕重，有冒昧的意思

維基詞典

Entry Composition

1 不知 bùzhī
  1. not to know
  2. unaware
  3. unknowingly
  4. fig. not to admit (defeat, hardships, tiredness etc)
2 輕重 qīngzhòng
  1. severity (of the case)
  2. degree of seriousness
  3. whether sth is slight or serious

Related entries

天真 tiānzhēn
  1. naive
  2. innocent
  3. artless
你太天真了。

You're so naive.

You're too naive.

Source: Tatoeba

不知就裡 bùzhījiùlǐ
  1. unaware of the inner workings
  2. naive
  3. unwitting
涉世未深 shèshìwèishēn
  1. unpracticed
  2. inexperienced
  3. naive
  4. unsophisticated
憨 hān
  1. silly
  2. simple-minded
  3. foolish
  4. naive
  5. sturdy
  6. tough
  7. heavy (of rope)
素樸 sùpǔ
  1. simple
  2. unadorned
  3. unsophisticated
  4. naive