dveḷhaka

doubt Vin.iii.309; Dhs.1004, Dhs.1161; DN-a.i.68; Dhs-a.259; -citta uncertain Pv-a.13; -jāta in doubt Vin.iii.309; DN.iii.117 sq.; DN.iii.210
adveḷhaka (adj. sure, certain, without doubt Cnd.30 (+ advejjha)

Dh.

Sk. *dvaidhaka fr. adv. dvidhā, cp. dvi B I. 5