open

To knock  on a door  also provides the pronunciation

Components
启 sound,meaning component

  Sound Meaning component

  

open

攵 meaning component

  Meaning component

  

tap

Evolution

啟 Oracle script (~1250-1000 BC)

Oracle script

(~1250-1000 BC)
啟 Bronze script Late Shang dynasty (~1100 BC)

Bronze script

Late Shang dynasty (~1100 BC)
啟 Seal script Shuowen (~100 AD)

Seal script

Shuowen (~100 AD)
啟 Clerical script Western Jin dynasty (266-316 AD)

Clerical script

Western Jin dynasty (266-316 AD)
啟 Regular script Modern

Regular script

Modern
Definitions

() 

open; begin; to open; to start; to initiate; to enlighten or awaken; to state; to inform

() 

Qi son of Yu the Great [Yǔ], reported founder of the Xia Dynasty 夏朝[Xià​Cháo] (c. 2070-c. 1600 BC)

Most common words with 啟
Freq.
Word
Meaning

启动

to start (a machine)

开启

to open

启发

to enlighten

to open

启示

to reveal