家信的英文：
letter (to or from) home

参考例句：

Mother arrived home safely last night letter follows
妈昨晚平安抵家信另寄。

He decided to abridge his stay here after he received a letter from home.
他接到家信后决定缩短在这里的逗留时间。

letter是什么意思：
n. 字母；信；字面意义；证书，许可证；文学
v. 用字母标明，写字母于；写印刷体字母；赢得校名缩写字母标志

in letter and in spirit
在字面意义和精神实质上|无论形式和实际

The letter was a forgery.
这封信是伪造的。

Post the letter through the slit in the letter box.
把这封信从信箱的投信口投进去。

Imprint a postmark on a letter =imprint a letter with a postmark
盖邮戳于信上

The letter is directed to him.
这封信是写给他的。

home是什么意思：
n. 家，住宅；家庭，家庭生活；家乡；避难所；产地
adj. 家庭的；家用的；国内的；本地的
adv. 在家；回家；深入地
v. 回家；把...送回家；为...提供住处

They are rowing home.
他们正划船回家。

You will find our dorm a home from home.
你将会觉得在我们宿舍就像呆在家一样舒适。

Homing pigeons are bred for their ability to race home.
人们喂养信鸽是因为他们能够迅速找回家。

strike home to sb.
深深感动某人

The little pigs run to their homes.
三只小猪赶紧跑回各自的家里。