unken/ʌnˈkɛn/EtymologyBack-formation from unkenned, equivalent to un- + ken.unken means to not know, fail to recognise, be ignorant of. Lexicurio rates it Sui generis — a strength score of 96 out of 100.unken is pronounced /ʌnˈkɛn/.verbTo not know, fail to recognise, be ignorant of.adjOnly used in unken reflex.