cōng, chuāng
chimney
Derived from the top component of 悤. Depicts a line piercing an object. The meaning later shifted to "window" (now written 窗) and "chimney".
Evolution

Seal script
Shuowen (~100 AD)
Seal script
Shuowen (~100 AD)
Seal script
Shuowen (~100 AD)Traditional script
ModernSimplified script
ModernComponent uses
Meaning component in 1 character (1 verified)
Sound component in 1 character (1 verified)
Iconic component in 1 character (1 verified)
Sources
季旭昇《說文新證》p.761