不敢问津

不敢問津
bùgǎnwènjīn

to not dare to inquire (e.g. about the price of expensive goods)

Wiktionary

Entry Composition

1 不敢 bùgǎn
  1. (regional) cannot; must not; should not
  2. You flatter me; I wouldn't presume; I don't deserve this (praise, reward, etc.)
  3. cannot; must not; should not
  4. to not dare (to do something)
2 问津 wènjīn to make inquiries (mostly used in the negative)