đâu

đâu
adv
  1. where
  2. from wherever

particle
  1. (before a verb) no; not
  2. (at the end of a sentence) reinforces negation

丢

丢
character
  1. chữ Hán form of đâu (“(alternate form of 丟) lost, misplaced”).
  2. Nôm form of đâu (“where, not, negation marker”).