头发用英语表达为hair，解析如下：
一、音标： 英 [heə(r)] 美 [her]
二、意思：
n. 头发；毛发；极少量
三、词语搭配：
arrange one's hair 整理头发
brush one's hair 梳理头发
color sb's hair 给某人染发
comb one's hair 梳头
cut (off) sb's hair 给某人削发
do sb's hair 给某人做头发
do up one's hair (女人)梳理头发,把头发盘起来
dress one's hair 梳理头发
beautiful hair 美丽的头发,秀发
black hair 黑发
brown hair 褐色的头发
smooth hair 光滑的头发
soft hair 柔软的头发
straight hair 直挺的头发
thick hair 浓密的头发
四、用法：
hair指“(人、动物的)毛，茸毛，汗毛”时是可数名词,可与数词连用表示具体数量(如几根),也可用a few, many, several等修饰表示不定数量。
hair泛指“头发”时,指人的整个头发,是集合名词,不可数。
五、例句：
She is combing her matted hair.
她正在梳理她那乱蓬蓬的头发。
That dress matches her red hair.
那件连衣裙和她的红头发很相配。
She patted her hair to be sure that it was neat.
她轻拍头发使之整齐。
She put up her hair and suddenly she was precipitated into maturity.
她把头发束起,一下子就变得像大人了。
His hair was carefully arranged.
他的头发梳理得很仔细。
The barber had cut your hair very short.
理发师把你的头发剪得很短。