expression, noun
waist; narrow part of the waist
Refers specifically to the indented or narrow part of the waist, often in the context of body shape or clothing fit.
彼女は腰のくびれが美しい。
She has a beautiful waistline.
このドレスは腰のくびれを強調するデザインだ。
This dress is designed to emphasize the waist.
Compound of 腰 (こし, 'waist, lower back') + の (possessive particle) + くびれ (noun form of くびれる, 'to be constricted, to narrow'). Literally 'the narrowing of the waist'.