gaping
gape + -ing
https://gyazo.com/4829b9a2d2bd3992e3cb174b4c234964
source: Manga vs. Anime: Made in Abyss | Sin Orden ni Concierto
adjective
(of a hole, wound, etc.) wide open:
〖通例名詞の前で〗大きく［ぽっかりと］開いた〈穴など〉.
e.g. there was a gaping hole in the wall.
DERIVATIVES
gapingly |ˈɡāpiNGlē| adverb