Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • adjective Persistent or untiring. synonym: tireless.

from The Century Dictionary.

  • Not flagging; not drooping; maintaining strength or spirit; sustained; as, unflagging zeal.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective Never tiring or lacking energy; without rest; without slowing.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • adjective showing sustained enthusiastic action with unflagging vitality
  • adjective unceasing

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

un- +‎ flagging

Examples

  • Defence lawyer Sean May, who asked for three to six months in jail, said his remorseful client has no criminal record, welcomes treatment and has the "unflagging" support of his wife

    Ottawa Sun

  • The show often opened with Mr. LaLanne backlighted, doing jumping jacks, before the lights came up and he began his unflagging efforts to get watchers up and moving with him.

    Jack LaLanne dies; fitness guru helped shepherd in an era of health-consciousness

  • You haven't finished with the French, said Socialist Sen. Jean-Pierre Bel, alluding to an apparently unflagging determination by unions, now joined by students, to keep protests alive – even through the upcoming week of school holidays.

    French Senate Passes Pension Cuts To Raise Retirement Age

  • You haven't finished with the French, said Socialist Sen. Jean-Pierre Bel, alluding to an apparently unflagging determination by unions, now joined by students, to keep protests alive – even through the upcoming week of school holidays.

    French Senate Passes Pension Cuts To Raise Retirement Age

  • As it turned out, it mattered all right—it was a gift—to have at hand episode after sterling episode of this unflagging drama of a former boxing champion looking for a comeback: a story whose reflection of current hard times colors every scene.

    What a Knockout of a Series

  • This bucolic frolic was directed with unflagging é lan by Stephen Frears from a script with a layered lineage: Moira Buffini adapted a graphic novel by Posy Simmonds which was, in its turn, a contemporary riff on Thomas Hardy's "Far From the Madding Crowd."

    A Grownup Look at Lennon as a 'Boy'

  • She never bristled at being told what to do, issuing her oídos with an unflagging enthusiasm that would have made you think she was volunteering for a second ice cream cone rather than agreeing to lug a crate of vegetables back from the walk-in.

    The Sorcerer’s Apprentices

  • Even Chancellor Angela Merkel, who not so long ago pledged Germany's unflagging support for Israel's quest for security, recently told Netanyahu that no one can any longer believe anything he says about Israel's interest in peace.

    Henry Siegman: The Democracy Revolutions and the Israel-Palestine Conflict

  • Many of the qualities that come so effortlessly to dogs -- loyalty, devotion, selflessness, unflagging optimism, unqualified love -- can be elusive to humans.

    John Grogan - An interview with author

  • Even Chancellor Angela Merkel, who not so long ago pledged Germany's unflagging support for Israel's quest for security, recently told Netanyahu that no one can any longer believe anything he says about Israel's interest in peace.

    Henry Siegman: The Democracy Revolutions and the Israel-Palestine Conflict

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