adjective Etymology: Middle English, from Latin incommutabilis, from in- + commutabilis commutable Date: 15th century not commutable: as, not interchangeable, unchangeable , incommutably adverb
INCOMMUTABLE
Meaning of INCOMMUTABLE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012