nghiền

nghiền
verb
  1. to grind; to crush; to pound
  2. (colloquial) to cram; to swot
  3. (Central Vietnam, Southern Vietnam) Alternative form of nghiện (“to be addicted (to); to give oneself up (to)”)

研

研
character
  1. chữ Hán form of nghiên (“to study, to research”).
  2. Nôm form of nghiền (“to grind”).