(adv.) In a permanent manner.

abidingly ad infinitum always ceaselessly changelessly constantly continually continuously endlessly enduringly eternally everlastingly for good forever forevermore in perpetuity incessantly indestructibly infinitely inflexibly interminably invariably lastingly never-endingly perdurably perennially perpetually rigidly statically steadfastly steadily time without end unceasingly unchangingly unendingly unwaveringly without end world without end