from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Displaying or feeling no fatigue; tireless. See Synonyms at tireless.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Tireless; incapable of being wearied.
from the GNU version of the Collaborative International Dictionary of English
- adj. Incapable of being wearied.
from The Century Dictionary and Cyclopedia
- Incessant; unwearying; unwearied: as, weariless wings.
weary + -less (Wiktionary)