Interminable

прилагательное бесконечный, беспредельный Синоним(ы): boundless, endless

Большой англо-русский словарь

Interminable

adjective Etymology: Middle English, from Late Latin interminabilis, from Latin in- + terminare to terminate having or seeming to have no end; especially wearisomely protracted Example: an interminable sermoninterminableness nouninterminably adverb

Merriam-Webster's Collegiate Dictionary