蝘

Its parts

• 虫 chóng lower form of animal life, including… meaning
• 匽 yǎn to hide, to secrete, to repress = 匸 + 妟 sound

Other characters with 匽 as their sound:

堰 yàn偃 yǎn郾 yǎn揠 yà鰋 yǎn

Dictionaries file it under 虫.