12. feminine stems ending in -u (paradigm vadhu-, wife):
 
  Sg. Du. Pl.
Nom. vadhuh vadhvau vadhvah
Acc. vadhum vadhvau vadhuh
Ins. vadhva vadhubhyam vadhubhih
Dat. vadhvai vadhubhyam vadhubhyah
Abl. vadhvah vadhubhyam vadhubhyah
Gen. vadhvah vadhvoh vadhunam
Loc. vadhvam vadhvoh vadhusu
Voc. vadhu vadhvau vadhvah