MASCULINE FEMININE NEUTER SINGULAR NOM. vacuus vacua vacuum GEN. vacui vacuae vacui DAT. vacuo vacuae vacuo ACC. vacuum vacuam vacuum ABL. vacuo vacua vacuo PLURAL NOM. vacui vacuae vacua GEN. vacuorum vacuarum vacuorum DAT. vacuis vacuis vacuis ACC. vacuos vacuas vacua ABL. vacuis vacuis vacuis