1. a person who suggests or implies something indirectly, especially something unpleasant or damaging
2. a person who gradually gains favor or acceptance through subtle or cunning means

Examples

• The office insinuator spread rumors without ever stating them directly.
• She was a skilled insinuator who could plant doubts in people’s minds.
• The politician was known as an insinuator who never made clear accusations.
• He was an insinuator who wormed his way into the group’s confidence.
• The insinuator’s subtle comments gradually turned the team against their leader.
• As an insinuator, she excelled at making people question their assumptions.