sanction
Sanction is a famously two-faced word: it can mean official permission to do something, or an official penalty for doing something wrong. Both senses come from Latin sancire, 'to make binding', and that is the thread — an authority makes its will binding, whether by approving an act or by punishing one. As a verb it usually means to approve ('the board sanctioned the plan'); as a plural noun it usually means penalties ('trade sanctions'). Context, and grammatical number, tell you which face you are seeing.
- impose sanctions
- economic sanctions
- lift sanctions
- officially sanction
- sanction a plan
Family sanctioned (adjective) · sanctioning (adjective)
=approve, authorize, endorse, penalty, embargo
≠ban, prohibit, veto
A genuine contronym and a favourite trap: the verb tends to mean 'approve', while the plural noun 'sanctions' almost always means 'penalties'. Learn it through collocations — impose / lift / tighten sanctions for the penalty sense, 'officially sanction' for the approval sense. Very common in IELTS reading on international relations and law; let the surrounding words disambiguate it.