0 relaxed and not worried or frightened -- calmo
a calm voice una voce calma
1 If the weather or the sea is calm, it is quiet and peaceful. -- calmo
2 to make someone stop feeling upset, angry, or excited -- calmare
3 calm conditions or behaviour -- calma
4 still or quiet -- calmo
5 not anxious or excited -- calmo
Please keep calm!
a calm person/expression