有口难言

有口難言
yǒukǒunányán

cannot bring oneself to mention something; to find it hard or embarrassing to bring up a matter

Wiktionary

Entry Composition

=1 有 yǒu
  1. to have; there is
  2. (bound form) having; with; -ful; -ed; -al (as in 有意 yǒuyì intentional)
=1 有 yòu
  1. (obsolete on its own in Standard Chinese) alternative form of 又 (yòu, “again”)
  2. (obsolete on its own in Standard Chinese) alternative form of 又 (yòu, “and; with a remainder of (when dividing an integer by ten)”)
  3. alternative form of 又 (yòu, “again”)
  4. alternative form of 又 (yòu, “and; with a remainder of (when dividing an integer by ten)”)
2 口 kǒu
  1. mouth
  2. classifier for things with mouths (people, domestic animals, cannons, wells etc)
  3. classifier for bites or mouthfuls
3 难言 nányán
  1. (formal) to be hard to say; to be difficult to talk about
  2. to be hard to say; to be difficult to talk about