perceive + -ive

source: Ryuugajou Nanana no Maizoukin (TV) Episode 11 Discussion - Forums - MyAnimeList.net

having or showing sensitive insight:

｟ほめて｠ 洞察［理解］力のある〈人･言葉･思想など〉; 知覚の鋭い, 明敏な

e.g. an extraordinarily perceptive account of their relationship.

perceptively |pərˈseptivlē| adverb

perceptiveness |pərˈseptivnəs| noun

perceptivity |ˌpərsepˈtivitē| noun