Meaning & readings

open, unfold, unseal

On’yomi カイ
Kun’yomi ひら.く、ひら.き、-びら.き、ひら.ける、あ.く、あ.ける
Nanori はる、か、ひらき

Origin

The character 開 combines two visual ideas to express "open." The left part, 門, depicts a gate or door — something that can be opened or closed. The right part, 开, shows something being split or separated. Together, these convey the action of opening a gate or door by pulling its two sides apart. Over time, the meaning expanded from the literal act of opening a door to the broader sense of unfolding or unsealing anything.

開 12 strokes

Components

  • 門 radical enclosure
  • 开 meaning part

Common words

  • 開く ひらく to open; to undo
  • 開演 かいえん curtain raising; starting (e.g. play, concert)
  • 開花 かいか flowering; blooming
  • 開会 かいかい opening of a meeting
  • 開館 かいかん opening (for that day's business; of a library, museum, cinema, etc.)
  • 開業 かいぎょう opening a business; opening a practice
  • 開局 かいきょく opening (of a broadcasting station, post office, bureau, etc.); establishment
  • 開口 かいこう opening; aperture (e.g. camera)

Reference

Strokes
12
Kangxi radical
169
Formation type
Compound ideographic (combined meanings)
Grade
Grade 3 (Kyōiku)
Frequency rank
#59 (newspapers)
Former JLPT
level 3
Unicode
U+0958B