noun, noun or participle which takes 'suru', intransitive verb
imposing stance; daunting pose
Standing with feet firmly planted and arms crossed or akimbo, like a statue of a temple guardian (仁王). Often used for someone blocking the way or looking intimidating.
彼は玄関で仁王立ちして、誰も通さなかった。
He stood imposingly at the entrance and wouldn't let anyone pass.
先生が
The teacher stood with a daunting pose in front of the classroom, urging everyone to be quiet.