1calm 
/ˈkɑ:m/ adjective
calm·er; calm·est /ˈkɑ:m/ adjective 1 : not angry, upset, excited, etc.
▪ The teacher asked us to remain/stay calm after the fire alarm went off. ▪ The capital city was calm despite rumors of a possible terrorist attack. [=people in the city behaved in the usual way; there was not a lot of excited or fearful activity in the city] ▪ Let's try to have a calm discussion about your grades. ▪ My brother is always calm, cool, and collected. [=he never gets very upset] 2 — used to describe weather that is not windy, stormy, etc. ▪ a calm day ▪ They're predicting calm winds today. ▪ a calm sea [=a sea that has no waves or only very small waves]
▪ The teacher asked us to remain/stay calm after the fire alarm went off. ▪ The capital city was calm despite rumors of a possible terrorist attack. [=people in the city behaved in the usual way; there was not a lot of excited or fearful activity in the city] ▪ Let's try to have a calm discussion about your grades. ▪ My brother is always calm, cool, and collected. [=he never gets very upset]
— calm·ly adverb [more calmly; most calmly]
▪ The coach calmly told her players what to do next.
▪ The coach calmly told her players what to do next.
— calm·ness noun [noncount]
▪ I suddenly had a great feeling of calmness.
▪ I suddenly had a great feeling of calmness.
