interminable

Being or seeming to be without an end; endless: synonym: continual.

Without termination; endless; having no limits or limitation; unending; long drawn out: as, interminable space or duration; interminable sufferings.

Synonyms Limitless, illimitable.

Without termination; admitting no limit; boundless; endless; wearisomely protracted.

Existing or occurring without interruption or end; ceaseless, unending.

tiresomely long; seemingly without end