let in on

US /let ɪn ɑːn/
UK /let ɪn ɑːn/
"let in on" picture
1.

membenarkan tahu, memasukkan ke dalam

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.
Mereka akhirnya membenarkan saya tahu rancangan mereka untuk parti kejutan itu.
She refused to let him in on the secret.
Dia enggan membenarkan dia tahu rahsia itu.