homesickness for sth
homesickness 通常作不可数名词，后接 for 表示思念的对象。
She understood his homesickness for his family.
她理解他对家人的乡愁。
乡愁
思乡的特征；身处异地时对家乡(及留下的亲友)的强烈悲伤思念；想回家的渴望
思乡的特征；身处异地时对家乡(及留下的亲友)的强烈悲伤思念
The characteristic of being homesick; a strong, sad feeling of missing one's home (and often left-behind loved ones, such as family and friends) when physically away.
想回家的渴望
a longing to return home
Her homesickness faded after she made some new friends at school.
她在学校交了一些新朋友后，想家的情绪渐渐淡了。
用法提示：homesickness 为名词，作主语，表达想家/思乡之情。
He tried to relieve his homesickness by calling his family every evening.
他试着每天晚上给家人打电话来缓解乡愁。
用法提示：homesickness 为名词，作动词 relieve 的宾语。
The homesickness he felt during his first year abroad eventually disappeared.
他在国外第一年感受到的乡愁最终消失了。
用法提示：homesickness 为名词，作主语，后接定语从句。
homesickness 通常作不可数名词，后接 for 表示思念的对象。
She understood his homesickness for his family.
她理解他对家人的乡愁。
a wave of 表示“一阵（情绪）”，与 homesickness 搭配时强调突然而强烈的感觉。
A wave of homesickness washed over him as he boarded the plane.
他登机时，一阵乡愁涌上心头。
be overcome with 表示“被（情绪）压倒”，也可写作 be overcome by。
They were overcome with homesickness after hearing the news.
听到这个消息后，他们被乡愁所淹没。
也可指对过去时光的怀念，不一定是离家；在思乡语境中才与 homesickness 互换。
广义的渴望，单独使用不含“家”；要说 longing for home 才明确指乡愁。
比 longing 更强烈、更书面；同样需要搭配 for home 来指乡愁。
较文学化，常带忧伤、憔悴的意味；作名词时常用 pining for home。
grammar · medium
易错句子I am homesickness.
正确表达I am homesick.
be动词后作表语应使用形容词，homesickness是名词，不能直接作表语；表示“想家”的状态要用形容词homesick。
grammar · medium
易错句子I am suffering from homesick.
正确表达I am suffering from homesickness.
介词from后必须接名词或动名词作宾语，homesick是形容词，不能作宾语；这里表示“受乡愁之苦”要用名词homesickness。
grammar · medium
易错句子I am homesick of my hometown.
正确表达I am homesick for my hometown.
固定搭配be homesick for表示“思念某地/某人”，介词of没有这种用法，不能用of代替for。
wanderlust 指渴望外出旅行、探索远方，与 homesickness（思念家乡）方向相反；但 wanderlust 不是对家乡的负面情绪，而是主动向往他乡。
homesickness 是名词，指“想家、思乡”的状态；homesick 是形容词，用来描述人“感到想家”。注意搭配：be/feel homesick，而不是 be homesickness。
nostalgia 和 homesickness 都常译作“乡愁”，但 nostalgia 范围更广，可指对过去时光、地点或经历的怀念；homesickness 专指因离开家或故乡而产生的想家情绪。强调“想念家乡”用 homesickness，强调“怀念过往”用 nostalgia。
饱受思乡之苦
Many international students suffer from homesickness in their first semester.
许多国际学生在第一个学期饱受思乡之苦。
克服想家情绪
She joined a club to help overcome her homesickness.
她加入了一个社团来帮助自己克服想家情绪。
一阵乡愁
A wave of homesickness swept over him at the sight of the moon.
看到月亮时，一阵乡愁向他袭来。
严重的想家情绪
Severe homesickness can affect a student's academic performance.
严重的想家情绪会影响学生的学业表现。
应对想家情绪
He learned to deal with homesickness by calling his family every day.
他学会通过每天给家里打电话来应对想家情绪。
对抗乡愁
She tried to fight her homesickness by exploring the new city.
她尝试通过探索新城市来对抗乡愁。
sick + -ness
sea + sickness
air + sickness
car + sickness
home + sick
heart + sick
身处异乡时，与家乡的距离是乡愁产生的前提。
想念的对象通常是家人，因此常出现在相关话题中。
缓解乡愁常需要来自他人的安慰或自我调节。
适应新环境是逐渐克服乡愁的重要过程。
返回家乡是乡愁最直接的缓解方式。
Dictionary facts from ECDICT, WIKTIONARY.