to be embarrassed or confused (lit. to become quite stiff), to be at a loss, to hesitate Vin.i.94 = Vin.ii.272; aor. vitthāsi (vitthāyi? ibid. [the latter taken as aor. of tras by Geiger, P.Gr. § 166]
pp vitthata² & vitthāyita.

vi + styā: see under thīna