noun
base of the throat; bottom of the neck
Refers to the area where the neck meets the torso, often used when describing clothing, accessories, or physical contact near the collarbone.
寒いので、首元にマフラーを巻いた。
Because it was cold, I wrapped a scarf around my neck.
彼女は首元にネックレスをしていた。
She was wearing a necklace around her neck.
首 is the general word for 'neck', while 首元 specifically refers to the base or bottom part of the neck.
Compound of 首 (kubi, 'neck') and 元 (moto, 'base, origin').