From a few numerals are made multiplicative adverbs with s: namely, dvís, trís, and catúr (probably, for catúrs): 489 a.

a. The corresponding word for once, sakṛ́t, is a compound rather than a derivative; and the same character belongs still more evidently to pañcakṛ́tvas, navakṛ́tvas,aparimitakṛ́tvas, etc., though kṛt and kṛtvas are regarded by the native grammarians as suffixes; the earlier texts (AV. ÇB. MS.) have saptá kṛ́tvas, dáça kṛ́tvas, dvā́daça kṛ́tvas, aṣṭā́v evá kṛ́tvas, etc. AB. has the redundant combination triṣ kṛtvah.

b. The quasi-suffix dyus, from a case-form of div day, is in a similar manner added to various determining-words, generally made to end in e: e. g. anyedyús another day, ubhayedyus(AV. -yadyús) on either day, pūrvedyús the day before.