90% of the time, speakers of English use just 7,500 words in speech and writing. These words appear in red, and are graded with stars. One-star words are frequent, two-star words are more frequent, and three-star words are the most frequent.
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In British English, you can say partner to refer to a person who is the husband or wife of someone, or to refer to a person who someone is living with and having a sexual relationship with, without being married to them. This avoids mentioning the person’s status or sex. In American English, some people only use partner about unmarried people, and many others only use it about gay men or women.