Chinese words · HSK 7–9

窟窿

kūlong

hole; cavity

Every meaning

kūlong

  1. hole; cavity
  2. (fig.) deficit; debt

Its characters

  • 窟kūcave; hole
  • 窿long

Meanings are from Mandarin The Wild’s own dictionary. Levels follow the official HSK word list (the exam’s 2025 syllabus, levels 7–9 shown together).