Interminable
Having or seeming to have no end;
especially: wearisomely protracted
The word was borrowed into
English in the 15th century and descends from a Latin combination of the prefix
in- ("not") and the verb terminare, meaning "to terminate"
or "to limit." The word describes not only something without an
actual end (or no end in sight, such as "interminable oceans"), but
also events, such as tedious lectures, that drag on in such a way that they
give no clear indication of ever wrapping up. Other relatives of interminable
in English include terminate, determine, terminal, and exterminate.