कृत्वस्

{ kṛtvas }

A Sanskrit English Dictionary

कृत्वस्  n.  a ind. at the end of a numeral or numeral adjective, -fold, times ( e.g. दश-कृत्वस्, ten times; बहु-क्°, many times; पञ्च-क्°, fivefold, [Pāṇ. 2-3, 64]). In the वेद is used as a separate word ( e.g. भू॑रि क्°, many times, [RV. iii, 18, 4]; प॑ञ्च क्°, [TS. vi]), but according to, [Pāṇ. 5-4, 17 and 20] ( [Vop. vii, 70]) it is only an affix, and it is so used in classical Sanskṛt
कृतु   it was originally an acc. pl. fr., formed by the affix तु fr. √ 1. कृ ( cf. also कृत् in सकृ॑त्.)
कृत्वस्    b &c. See, ib.

The Practical Sanskrit-English Dictionary

कृत्वस् [kṛtvas]   ind. An affix added to numerals to denote 'fold' or 'times'; e. g. अष्टकृत्वः eight times, eight-fold; so दश˚, पञ्च˚ &c.