It was the hard line, not the soft line, that briefly diverted Iran from its dangerous path.
Republicans take back the House Wednesday, pledging a hard line on ethics.
He took a hard line on military action against Iran if the country continues its nuclear development.
: the President's hard-line views on abortionnoun phrase
A policy or attitude based on severity and lack of compromise: Take a hard line with them or they'll murder you (1960s+)