hairpin

US /ˈher.pɪn/
UK /ˈher.pɪn/
"hairpin" picture
1.

a U-shaped pin for fastening the hair in place

:
She secured her bun with a few hairpins.
He found a small, decorative hairpin on the floor.
2.

a very sharp bend in a road or path

:
The car struggled to navigate the steep hairpin turn.
The mountain road was full of dangerous hairpins.