the gloom of the grave a tomb or grave

A dark  cave  also provides the pronunciation

Components
穴 meaning component

  Meaning component

xué

  

cave

夕 sound,meaning component

  Sound Meaning component

  

evening

Evolution

穸 Seal script Shuowen (~100 AD)

Seal script

Shuowen (~100 AD)
穸 Clerical script Eastern Han dynasty (25-220 AD)

Clerical script

Eastern Han dynasty (25-220 AD)
穸 Regular script Modern

Regular script

Modern
Definitions

 

the gloom of the grave a tomb or grave; death; tomb