deriv SD cv (633) ashtadhyayi.com hei.de L 633 ETT STT a 2.4.53 ALPH OLDHOMEPAGE NEWHOMEPAGE

bruvo vaciH ब्रुवो वचिः ONPANINI 24053

Replace /brU "speak" with vac वच् (before a soft).

Just like the root /as is replaced with bhU भू by < asterbhUH.

/brU + /tumun
→ vac वच् + /tumun
→ !**vaktum वक्तुम् "in order to speak"

The i इ in vaci वचि is merely feop.