15 in on synonyms include privy to, aware of, acquainted with, informed about/of, advised of, apprised of, mindful of, sensible of, and clued in on. In on is a preposition, and its antonyms are excluded and out of. Here are some additional synonyms for "in on" with example sentences.
15 other ways to say in on.
Are you in on the secret?
He was in on the plan from the start.
She was in on the surprise.
They kept her in on all decisions.