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change one's hairstyle
change one's hairstyle 指改变整体发型，不一定是剪短或染发。
She changed her hairstyle before the wedding.
她在婚礼前换了发型。
发型
先理解核心含义，再看它在真实句子里的用法。
发型
a particular way of cutting or arranging hair, especially a woman's hair
She changed her hairstyle before the wedding.
她在婚礼前换了发型。
The style in which someone's hair has been cut and arranged.
头发的造型(尤其是女性的头发)
the arrangement of the hair (especially a woman's hair)
She changed her hairstyle before the job interview.
她在面试前换了发型。
That new hairstyle really suits you.
那个新发型真的很适合你。
He spends a lot of time on his hairstyle every morning.
他每天早上花很多时间打理发型。
change one's hairstyle 指改变整体发型，不一定是剪短或染发。
She changed her hairstyle before the wedding.
她在婚礼前换了发型。
suit 用于表示发型、衣服等衬托得某人好看。
I think this hairstyle suits you very well.
我觉得这个发型非常适合你。
描述某人留某一发型时常用 have，也可用 wear。
He has a very distinctive hairstyle.
他有一个非常独特的发型。
Not this
I want to hairstyle my hair for the party.
Use this
I want to style my hair for the party.
“hairstyle”是名词，不是动词。表示“做发型”要用动词“style”或“have my hair styled”。
Not this
She has beautiful hairstyle.
Use this
She has a beautiful hairstyle.
“hairstyle”是可数名词，单数前需要加冠词或限定词。中文里“发型”没有单复数概念，因此容易漏掉冠词。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
改变发型
She decided to change her hairstyle for the wedding.
她决定为婚礼改变发型。
时髦的发型
He got a stylish hairstyle for the party.
他为派对弄了个时髦的发型。
短发发型
Short hairstyles are popular this summer.
今年夏天短发发型很流行。
选择发型
It's hard to choose a hairstyle that suits everyone.
很难选择一款适合所有人的发型。
Use hairstyle naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
把 hair（头发）和 style（样式）拼在一起：头发做成的样式，就是 hairstyle 发型。
语域：neutral 常见场景：日常对话、美发店、时尚报道 这是一个中性常用词，日常交流、美发店或时尚话题中都比较常见；口语和书面语都可以用，没有明显的正式或非正式倾向。
The words style, smile, while, tile, mile and file all end with the same /aɪl/ sound as the final syllable of hairstyle (/staɪl/). But hairstyle is stressed on hair-, so the rhyme is only on the second part. Watch out: hair looks like it might match these, but it is pronounced /hɛr/ and does not rhyme.
Dictionary facts from ECDICT, WIKTIONARY.