tranquilizer
US /ˈtræŋ.kwə.laɪ.zɚ/
UK /ˈtræŋ.kwə.laɪ.zɚ/

1.
a medicinal drug taken to reduce tension or anxiety.
:
•
The doctor prescribed a mild tranquilizer to help her sleep.
•
He was given a strong tranquilizer before the surgery.
a medicinal drug taken to reduce tension or anxiety.