re ‧ course /rɪˈkɔːs $ ˈriːkɔːrs/ BrE AmE noun [singular, uncountable] formal
[ Date: 1300-1400 ; Language: French ; Origin: recours , from Latin , from recurrere ; ⇨ ↑ recur ]
something that you do to achieve something or deal with a situation, or the act of doing it:
We may conclude that he never had recourse to this simple experiment.
without recourse to something (=without using or doing something)
a way of solving disputes without recourse to courts of law
Surgery may be the only recourse.