Collins Russian Dictionary 2nd Edition © HarperCollins Publishers 2000, 1997:
sanction [ˈsæŋkʃən] n (approval) са́нкция
vt (give approval to) санкциони́ровать (impf/perf)
sanctions
npl (severe measures) са́нкции fpl
to impose economic sanctions on or against применя́ть (примени́ть*perf) экономи́ческие са́нкции про́тив +gen
* is used to mark translations which have irregular inflections. The Russian-English side of the dictionary gives inflectional information.