What is the meaning of ?

the sky

something empty

ineffectual

false

empty air

meaninglessness

sunyata: emptiness, vacuity, awareness, openness, thusness

void: one of the 五大 (godai, literally great five) and the highest of the five elements

the sky, heavens

Chữ Hán form of không (empty; void).

Chữ Hán form of không.

  1. air; sky
  2. zero; none

air; sky

zero; none

chữ Nôm form of không (zero).

Source: wiktionary.org