đây

đây
pron
  1. this place here
  2. this thing/person

particle
  1. emphasizes the very thing or person here
  2. forms a question expressing uncertainty or doubt
  3. Sentence-final particle used to point out a place or an event the speaker wants to stress. The place or event can be seen at the moment of speaking.
  4. sentence-final particle used to refer to the speaker's idea or feeling of existence or presence of something without certain proof

để

để
verb
  1. to place; to set
  2. to let; to leave (alone)

conj
  1. in order to, so that

底

底
character
  1. to place