kǎi

high quality iron

Components
钅 meaning component

  Meaning component

jīn

  

metal

metal

皆 sound component

  Sound component

jiē

  

all

Evolution

锴 Seal script Shuowen (~100 AD)

Seal script

Shuowen (~100 AD)
锴 Seal script Western Han dynasty (202 BC-9 AD)

Seal script

Western Han dynasty (202 BC-9 AD)
锴 Simplified script Modern

Simplified script

Modern
Definitions

() 

kǎi

high quality iron