[im-pon-der-uh-buh l]
See more synonyms for imponderable on
  1. an imponderable thing, force, agency, etc.

Origin of imponderable

From the Medieval Latin word imponderābilis, dating back to 1785–95. See im-2, ponderable
Related formsim·pon·der·a·bil·i·ty, im·pon·der·a·ble·ness, nounim·pon·der·a·bly, adverb Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for imponderable

Historical Examples of imponderable

  • A hot body was one which had absorbed an imponderable substance.

    The Machinery of the Universe

    Amos Emerson Dolbear

  • Matter was for the moment as subtle, as imponderable as soul.

  • At all events the onus of proof rests with those who assert it is imponderable.

    Aether and Gravitation

    William George Hooper

  • We have not the slightest reason to believe that Aether is imponderable.

    Aether and Gravitation

    William George Hooper

  • Likeness, dear Baron, is often the result of imponderable things.

    Three Plays

    Luigi Pirandello

British Dictionary definitions for imponderable


  1. unable to be weighed or assessed
  1. something difficult or impossible to assess
Derived Formsimponderability or imponderableness, nounimponderably, adverb
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for imponderable

1794, "weightless," from assimilated form of in- (1) "not, opposite of" + ponderable (see ponder). Figurative use, "unthinkable," from 1814. Related: Imponderably. As a noun, by 1842.

Online Etymology Dictionary, © 2010 Douglas Harper