the color between black and white; ash-colored

(bound form) throat; larynx; often referred to as 喉咙 hóu​lóng or 喉头 hóu​tóu

anything shaped like a needle, such as a clock hand, a compass needle, or a pine needle

(bound form) tail of an animal

any of several birds in the swift family that resemble swallows but have longer wings and are known for fast flight; they often nest in crevices or under eaves