はまる
はまる · hamaru · JLPT N1 · verb-godan
to fit
🎣 はまる (hamaru) sounds like 'hammer on': a hammer fits right in its groove and gets stuck there, so you get into a hobby and fit in
Think of a peg that fits snugly into its hole: it has hamatta, got into place. Hooked on a game or a show, you have hamatte-iru, got stuck in it.