紛れる
JLPT N1 · Verbまぎれる(magireru)声调 3
to disappear into; to be lost in; to slip into; to do something under the cover of (confusion, etc.); to be almost indistinguishable; to be confusingly similar
泥棒が人ごみに紛れて逃げた。— The thief escaped by slipping into the crowd.