備わる
そなわる · sonawaru · JLPT N1 · verb-godan
to be furnished with
🧰 備 = equip/prepare, so 備わる = already equipped with, the intransitive form of 備える
備える means to prepare or equip something on purpose. Its intransitive partner 備わる describes a thing that comes already fitted with a quality or feature, built in from the start.