Nigger is an extremely offensive word for a black person.
[very offensive]
nigger in British English
(ˈnɪɡə)
noun offensive, taboo
1.
a.
a Black person
b.
(as modifier)
nigger minstrels
2.
a member of any dark-skinned race
3. nigger in the woodpile
▶ USAGE This highly offensive word is now generally taboo, especially when used by White people.It is also advisable not to use the word in any of the compounds or derivatives towhich it gave rise
Word origin
C18: from C16 dialect neeger, from French nègre, from Spanish Negro1
nigger in American English
(ˈnɪɡər)
noun slang
1. taboo
a.
a black person
b.
a member of any dark-skinned people
2. taboo
a person of any race or origin regarded as contemptible, inferior, ignorant, etc
3.
a victim of prejudice similar to that suffered by blacks; a person who is economically, politically, or socially disenfranchised
The term nigger is now probably the most offensive word in English. Its degree of offensiveness hasincreased markedly in recent years, although it has been used in a derogatory mannersince at least the Revolutionary War. Definitions 1a, 1b, and 2 represent meaningsthat are deeply disparaging and are used when the speaker deliberately wishes to causegreat offense. Definition 1a, however, is sometimes used among African-Americans ina neutral or familiar way. Definition 3 is not normally considered disparaging—asin “The Irish are the niggers of Europe” from Roddy Doyle’s The Commitments—but the other uses are considered contemptuous and hostile.