low–key also low–keyed 
/ˈloʊˈki:/ /ˈloʊˈki:d/ adjective
/ˈloʊˈki:/ /ˈloʊˈki:d/ adjective [more low–key; most low–key] : quiet and relaxed : not very forceful, emotional, or noticeable
▪ a politician with a low-key style ▪ The party was a low-key affair. ▪ a low-key approach to management
▪ a politician with a low-key style ▪ The party was a low-key affair. ▪ a low-key approach to management
