according

(verb) go together. Synonyms: harmonize, harmonise, consort, accord, concord, fit in, agree. Examples: "The colors don't harmonize." "Their ideas concorded."

(verb) allow to have. Synonyms: accord, allot, grant. Example: "Grant a privilege."

(adj) (followed by `to') in agreement with or accordant with. Example: "According to instructions."

(adj) (followed by `to') as reported or stated by. Example: "According to historians."