cụp

cụp
verb
  1. to hang loose; to hang down; to lower
  2. to shut; to close

khớp

khớp
noun
  1. (anatomy) joint (between two bones)
  2. joint; articulation

verb
  1. (often of two zigzag structures) to fit together nicely; to fit like a glove; to mesh; to engage
  2. to put together (parts of something) to form a whole object; to match together
  3. to match to compare (whether two things are compatible)
  4. to correspond; to match; to be in agreement; to tally; to fit in with

級

級