IPA: /ˈweɪstlaɪn/
KK: /ˈweɪstlaɪn/
A line that goes around the body at the waist, often used to refer to the measurement of that area or the part of clothing that fits around it.
She wore a dress that accentuated her waistline beautifully.
Waistline → It is formed from "waist" (from Old English *waist*, meaning the part of the body between the ribs and hips) and "line" (from Latin *linea*, meaning a string or line). The word "waistline" refers to the line or measurement around the waist area of the body.
Think of the 'waist' as the part of the body between the ribs and hips, and 'line' as a measurement — that's how you remember that 'waistline' refers to the measurement around the waist.
No commonly confused words.