noun, noun which may take the genitive case particle 'no'
Describes a person or object in a face-down position. Often used with に or で to indicate posture.
See also: 俯せる (うつぶせる)
赤ちゃんをうつ伏せに寝かせる。
Lay the baby on its stomach.
彼
He was reading a book lying on his stomach.
noun
placing face down; turning upside down
Refers to the action or state of putting something face down, such as a card, photo, or device. Often used with にする.
スマホをうつ伏せにして置く。
Place the smartphone face down.
写真をうつ伏せに伏せておく。
Leave the photo lying face down.