430. The stem day

 a. The stem áhan n. day is in the later language used only in the strong and weakest cases, the middle (with the nom. sing., which usually follows their analogy) coming from áhar or áhas: namely, áhar nom.-acc. sing., áhobhyām, áhobhis, etc. (PB. has aharbhis); but áhnā etc., áhni or áhani (or áhan), áhnī or áhanī,áhāni (and, in V., áhā).

b. In the oldest language, the middle cases áhabis, áhabhyas, áhasu also occur.

c. In composition, only ahar or ahas is used as preceding member; as final member, ahar, ahas, ahan, or the derivatives aha, ahna.

d. The stem ū́dhan n. udder exchanges in like manner, in the old language, with ū́dhar and ū́dhas, but has become later an as-stem only (except in the fem ūdhnī of adjective compounds): thus, ū́dhar or ū́dhas, ū́dhnas, ū́dhan or ū́dhani, ū́dhabhis, ū́dhaḥsu. As derivative from it are made both ūdhanyà and ūdhasya.