absolutive
having penetrated; having comprehended
Paṭivijjha (adjective) [gerund of paṭivijjhati] in compound dup° hard to penetrate (literal and figurative) S V 454.
(ger, ger of paṭivijjhati) comprehending; understanding; penetrating having penetrated, having comprehended [lit.] piercing back Construction: pati + √vidh + ya