First recorded in 1250-1300,anybody is from the Middle English word ani bodi. See any, body
Can be confused
antibody, anybody (see usage note at the current entry)
The pronoun anybody is always written as one word: Is anybody home? There isn't anybody in the office. The two-word noun phrase any body means “any group” (Any body of students will include a few dissidents) or “any physical body”: The search continued for a week despite the failure to find any body. If the word a can be substituted for any without seriously affecting the meaning, the two-word noun phrase is called for: a body of students; failure to find a body. If the substitution cannot be made, the spelling is anybody.Anybody is less formal than anyone. See also anyone, each, they.