1) Ad infinitum 2) All the time 3) At length 4) Ceaselessly 5) Everlastingly 6) Forever 7) Incessantly 8) Infinitely 9) Interminably 10) On and on and on 11) Seemingly without stopping 12) With unflagging resolve 13) Without bounds 1) Ad infinitum 2) Ceaselessly 3) Continuously 4) Forever 5) Incessantly 6) Interminably 7) On and on 8) Unceasingly 9) Unendingly 
[Brook Benton song] `Endlessly` is a 1959 single by Brook Benton. The follow-up to his breakthrough hit `It`s Just a Matter of Time`, it reached number 12 on the Billboard Hot 100. Its B-side, `So Close`, also reached the chart, peaking at number 38. `Endlessly` also became Benton`s first chart success in the UK, where it reached #28. In 19...
• (adv.) In an endless manner.
End'less·ly adverb In an endless manner. 
[adv] - (spatial sense) seeming to have no bounds 2. [adv] - with unflagging resolve
incessantly adverb with unflagging resolve; `dance inspires him ceaselessly to strive higher and higher toward the shining pinnacle of perfection that is the goal of every artiste`