to stay calm under stress or provocation
तनाव या उत्तेजना के तहत शांत रहना (tanaav ya uttejana ke tahat shaant rehna)
"Even in emergencies, he always keeps his cool."
"आपातकाल में भी, वह हमेशा अपने कूल को बनाए रखता है।" (aapaatkaal mein bhi, vah hamesha apne cool ko banaaye rakhta hai.)
to help someone out of kindness
At the right or appropriate time.
until the very last moment; close to the deadline
sometimes it's okay to ignore rules
to describe something in an overly optimistic way
to relax and do nothing