(anatomy) crotch, space between the legs

三叉: a three-way fork / 三椏: the paperbush, Edgeworthia chrysantha

三ツ俣: a male given name / 三叉: an area along the Sumida River in Tokyo between the Shin Ōhashi and the Kiyosu-bashi bridges, near the inlet of the Onagi Canal

(colloquial) bye, see you later

跨がる: straddle; extend into

猫又:

がに股, 蟹股: bowleg

unexpectedly, by chance; luckily

matatabi, Actinidia polygama

splitting from one into two / (especially) taking the entry tests for two schools / (especially) dating two people at once