U-shaped hair pin.

arrange (to set up, organise)

to use / to employ / to make use of, to apply / to spend

(typography, newspapers) a unit in newspaper typesetting, equal to 11 mils, ¹¹⁄₁₀₀₀ in, ¹⁄₈ 倍 (bai) and ¹⁄₁₂₈ 段 (dan)

(formal) Female third-person singular pronoun; she, her, girlfriend

(colloquial) a girlfriend (a female partner in a romantic relationship)

(literary) they (about women or girls)

hair on the head

hair

an ace in cards or a "one" in dice / the first or top item