hackle
US /ˈhæk.əl/
UK /ˈhæk.əl/

1.
颈羽, 颈毛
a long, narrow feather on the neck or lower back of a domestic fowl, especially a rooster.
:
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The rooster's iridescent hackles shimmered in the sunlight.
公鸡闪光的颈羽在阳光下闪烁。
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The dog's hackles rose when it sensed danger.
狗感到危险时,颈毛竖了起来。