口裡

口里
kǒulǐ
  1. Used other than figuratively or idiomatically: see 口 (kǒu), 裡 /里 (lǐ); inside the mouth
  2. area south of the Great Wall of China

Wiktionary

Entry Composition

1 口 kǒu
  1. mouth
  2. classifier for things with mouths (people, domestic animals, cannons, wells etc)
  3. classifier for bites or mouthfuls
2 裡 lǐ
  1. lining
  2. interior
  3. inside
  4. internal
  5. also written 裏 lǐ