Āyanā (f.) [?] at DhsA 259 and Vism 26 is a grammarian's construction, abstracted from f. abstr. words ending in ˚āyanā, e. g. kankhā > kankhāyanā, of which the correct expln. is a derivation fr. caus. -- formation kankhāyati > kankhāy + a + nā. What the idea of Bdhgh. was in propounding his expln. is hard to say, perhaps he related it to i and understood it to be the same as āyāna.