1. Belittle through talk
   "The manager talked down his employee's achievements during the performance review"
    
2. Speak in a condescending manner, as if to a child
   "He talks down to her"
    
3. Direct and control (the flight of an aeroplane during landing) via radio
   "the control tower talked down the plane whose pilot fell ill"

Derived forms: talked down, talking down, talks down

Type of: belittle, denigrate, derogate, direct, minimise [Brit], minimize, speak, talk