to become too frightened to do something
потерять храбрость сделать что-то
"I was going to ask her out, but I lost my nerve."
"Я собирался пригласить ее на свидание, но потерял храбрость."
to be in trouble, especially with someone you care about
a controversial issue that no one wants to deal with
to understand something that is complicated or unclear
very content and comfortable
to accept something unpleasant and continue
signs of problems or weaknesses in a system or relationship