Etymology tree French casuiste Proto-Indo-European *-ikos Proto-Italic *-ikos Latin -icuslbor. Old French -ique Middle French -ique French -ique French casuistiquebor. Polish kazuistyka Proto-Indo-European *-nós Proto-Balto-Slavic *-inas Proto-Slavic *-ьnъ Old Polish -ny Polish -ny Polish kazuistyczny From kazuistyka + -ny.