This is the 8438th most frequent German word.
keiner
"Keiner" means "no one" or "nobody" in English.
"Keiner" is used as an indefinite pronoun to denote nobody or no one.
Keiner weiß es.
No one knows it.
"Keinem" is the dative form of "keiner," used to indicate absence of ownership in this case.
Das gehört keinem.
This belongs to no one.
"Keiner" is used to refer to none out of a group.