to feel nervous or hesitant about something
sentirse nervioso o dudoso acerca de algo (sentirse nervioso o dudoso acerca de algo)
"He got cold feet before proposing to her."
"Se puso nervioso antes de proponerle matrimonio." (Se puso nervioso antes de proponerle matrimonio.)
to discuss something thoroughly
to stay calm by seeing things realistically
the ability to imagine and plan the future clearly
to be in trouble, especially with someone you care about
used when expressing a sincere or frank opinion
to be the first to do something new or innovative.