Hair hard and straight, slight wave at the topline, never curly.

毛发硬而直，顶部带有穗动，没有弯曲的被毛。

youdao

Although they are pretending hard to be young, grey hair and cellulite give them away.

尽管他们尽力装出年轻的样子，但是灰白的头发和皮下脂肪团却暴露了他们的真实年龄。

《柯林斯英汉双解大词典》

I find it hard to blow-dry my hair.

我感到给我的头发吹风很困难。

《柯林斯英汉双解大词典》

Apolo Anton Ohno, who still sports his trademark "soul-patch" [of facial hair just above his chin, says his hard work has paid off.

VOA: standard.2010.02.23

Babs was what Diana, God help us, might be thirty years hence high-heeled, ceramicized, liposucted, devaricosed, her golden fall of hair as shiny and hard as peanut brittle.

NEWYORKER: Wakefield

Something that the writer implies (and I am sure it was not his intention) is that many men feel threaten by the fact that women can do multitasks without having a hard attack or losing hair because we are used to work under a lot of pressure (family, friends, co-workers, society).

FORBES: Magazine Article

She had dirty grey hair around a face cut from a hard wood with a blunt tool.

NPR: Excerpt: 'The Broken Shore'