Sententious is an adjective that means given to using aphoristic sayings.
The Latin word sententia (sen TENSE ee uh) refers to ‘a thought’ or ‘expression.’ A sententious person is someone who relies heavily on the use of short, pithy aphorisms like ‘life is what you make it’ or ‘it’s about the journey, not the destination.’
In some contexts, calling someone sententious can be a compliment. It can mean they use wise, clever sayings. But sometimes it can describe someone who uses trite, simplistic cliches. For example: Coach Gaston had a cliche for every occasion. If you had a problem, he’d solve it by reminding you that there was ‘no I in team.’