Ap Cologne Sanskrit Dictionary ap 2 (in Ved. used in sing. and pl. , but in the classical language only in pl. , {Apas}) f. water ; air , the intermediate region the star Virginis ; the Waters considered as divinities. Ifc. {ap} may become {apa} or {Ipa} , {Upa} after {i-} and {u-} stems respectively. [Cf. Lat. {agua} ; Goth. {ahva} a river ; Old Germ. {aha} , and {affa} at the end of compounds ; Lith. {uppe} , a river ; perhaps Lat. {amnis} , a river , for {apnis}