"老公" 的英语是 "husband"。
"Husband" 来自古英语 "husbond"，该词由 "hus" 和 "bond" 两个词组成，"hus" 意为 "house"，"bond" 意为 "绑定"或"约束"。因此 "husbond" 原本的意思是 "家庭绑定者"。
例句：
My husband is a doctor. (我的老公是医生。)
I have been married to my husband for 10 years. (我和我老公结婚已经10年了。)
My husband and I are going on a vacation next month. (我和我老公下个月要去度假。)