1.
empty; vacant; blank
Prefix indicating emptiness or lack of content.
空〜 is a versatile prefix with meanings related to 'empty' or 'air/sky.'
Common compounds (EMPTY)
Common compounds (AIR/SKY)
Usage
The kanji 空 means 'sky' when read as a standalone word, but takes the reading くう in many compounds.
Related Words
Related:
空 (sky (kun reading))