Человек

Explanation - Челове́к
(M) - Man, Human

This word can mean either 'person/man', referring to an individual. It can also, however be used to mean 'human race' - for which, as in English, no plural form exists. When the word is used to mean 'person, man', the plural is different - like in English:
 * Person -> People
 * Человек -> Лю&#769;ди