to urge or advise (somebody) strongly
I exhorted them to behave well
to give warnings or advice; to make urgent appeals
exhortative /-tətiv/ adj
exhortatory /-tət(ə)ri/ adj
exhorter noun
exhortation noun
[Middle English exhorten via Old French from Latin exhortari, from ex-1 + hortari to urge, incite]