By the suffix dhā are formed adverbs especially from numerals, signifying -fold, times, ways, etc.

a. Thus, ekadhā́, dvidhā́ (also dvídhā and dvedhā́), trídhā (in the older language usually tredhā́), ṣaḍḍhā́ (also ṣoḍhā́ and ṣaḍdhā), dvādaçadhā́, ekānnaviṅçatidhā́,sahasradhā́, and so on. Also, naturally, from words having a quasi-numeral character: thus, anekadhā, katidhā́, tatidhā́, bahudhā́, purudhā́, viçvádhā, çaçvadhā́,aparimitadhā, yāvaddhā́, etāvaddhā́, māsadhā. In a very few cases, also from general noun and adjective stems: thus, mitradhā́ (AV.), priyadhā́ (TS.; predhā́, MS.),ṛjudhā́ (TB.), urudhā and citradhā (BhP.); and from one adverb, bahirdhā́.

b. The particle ádha or ádhā, a Vedic equivalent of átha, probably belongs here (purudhá and viçvádha, with shortened final, occur a few times in RV.); also addhā́ in truth; and perhaps sahá with, which has an equivalent sadha- in several Vedic compounds. And the other adverbs in ha (1100 a) may be of like origin.