yǎn, yān
to enclose
Original meaning:
to cover
Phonosemantic compound. 盍 represents the meaning and 甲 represents the sound. Based on the original meaning "to cover", now written as 掩.
Components
Evolution

Bronze script
Early Western Zhou (~1000 BC)
Seal script
Shuowen (~100 AD)
Clerical script
Cao Wei (Three Kingdoms: 222-280 AD)Regular script
ModernDefinitions
Component uses
Sources