let in on
US /let ɪn ɑːn/
UK /let ɪn ɑːn/
1.
inlichten over, meedoen met
to allow someone to share a secret or to know something that is not known by many people
:
•
They finally let me in on their plans for the surprise party.
Ze lieten me eindelijk meedoen met hun plannen voor het verrassingsfeestje.
•
She refused to let him in on the secret.
Ze weigerde hem in het geheim te laten.