talk down

verb5

1. •
   To convince a person to cease a drastic action or response, such as a suicide attempt or act of rage.

   • Talk him down, the rule book went. Calm him, get him secured. Easier said than done. Crane had talked down a would-be jumper standing on a support cable of the George Washington Bridge. — 2007
2. •
   (slang) To comfort someone experiencing a bad trip, to help them come down.

   • They may then go to a hippie clinic crash pad to be "talked down." — 1969
3. •
   To verbally assist someone to land an aircraft.

   • GET TALKED DOWN: When a pilot gets caught in weather, he may call the nearest tower for Ground Controlled Approach landing assistance, wherever the airport has GCA radar. — 1960
4. •
   To negotiate a lower price.

   • If he offers a very high price, see if you can talk him down before you agree to anything.
5. •
   To overcome by spoken argument.