罔
モウ, ボウ, あみ, しい.る, ない
net
JLPT0 G13 S0 F5000
The relevant seal inscription form is a net +
亡
# (obscure) → objects obscured in a *net* → *cover*; *obscure* (v.); *non-existence*. Compare
网
.
[Full Kanji Etymology List]