嵌める
JLPT N2 · Verbはめる(hameru)声调 0
to fit (e.g. a pane into a frame); to insert (e.g. a cork); to fasten (a button); to put on (something that envelops; e.g. a ring, gloves); to place (a hoop) around; to attach (e.g. a hose to a tap)
鉛筆にキャップを嵌める。— Put a cap on the pencil.