ichidan verb, transitive verb
To look at something secretly or through a small opening. Often implies a furtive or curious glance.
See also: 覗き見 (のぞきみ)
彼はドアの隙間から部屋の中を覗き見た。
He peeked into the room through a crack in the door.
隣の人の答案をのぞき見てはいけません。
Don't peek at your neighbor's answer sheet.