tranquilize
/ˈtræŋkwəlaɪz/
verb
- To make a person or animal calm or sleepy, especially by giving them a drug.
- They tranquilize large wild animals to attach tracking collars safely.
- The zookeeper had to tranquilize the lion before moving it to a new enclosure.
- The doctor used a mild sedative to tranquilize the anxious patient.