This is the 2539th most frequent Japanese word.
埋め
"埋め" means "filling" or "burial."
埋める is used here in the literal context of filling a hole with materials.
彼は穴を埋めるためにシャベルを使いました。
He used a shovel to fill the hole.
埋める is metaphorically used here to describe occupying free time with activities.
彼女は忙しさで空の時間を埋めていました。
She filled her free time with busyness.
埋める metaphorically expresses the emotional filling of a void in one's heart.