Intimation (noun)

1. An indirect suggestion or hint.
2. A slight suggestion or indication of something.
3. A subtle or informal communication.

Origin:

Late 16th century: from latin intimatio(n-), from intimare "make known, announce", from intimus "innermost".

Examples:

1. The boss's sudden departure was the first intimation that the company was in trouble.
2. He gave no intimation of his intention to leave the company.
3. The performance was marred by several intimations of the musicians' lack of rehearsal.
4. The manager gave no intimation of the changes that were coming.
5. The government gave no intimation of the new policy until it was announced.