Antonyms of adj hot_under_the_collar

1 sense of hot under the collar

Sense 1
hot under the collar (predicate) -- (very angry)

INDIRECT (VIA angry) -> unangry -- (not angry)

Similarity of adj hot_under_the_collar

1 sense of hot under the collar

Sense 1
hot under the collar (predicate) -- (very angry)
       => angry (vs. unangry) -- (feeling or showing anger; "angry at the weather"; "angry customers"; "an angry silence"; "sending angry letters to the papers")