Very calm and relaxed.
Очень спокойный и расслабленный. (ochen spokoyniy i rasslablenniy)
"Even in stressful situations, she stays as cool as a cucumber."
"Даже в стрессовых ситуациях она остаётся спокойной как удав." (dazhe v stressovikh sitooatsiyakh ana ostayotsya spokoynoy kak udav)
to change one's opinion or attitude
an unexpected gift or blessing
to start having doubts about a decision you have made
the time in old age when a person starts behaving like a chi...
to succeed in doing something difficult
to ask someone to marry you