One
Definition of one:
part of speech: pronoun
A person ( spoken of indefinitely), as in the phrase ONE SAYS.
part of speech: adjective
part of speech: adjective
Single in number: single: undivided: the same.
part of speech: adjective
Single in number; united; as, they answered with one voice; individual; a certain; as, one Henry; the same.
part of speech: pronoun
A certain person or thing considered indefinitely; anybody; as, one must take care.