imponderable

UK: /ɪmˈpɒndərəb^əl/ US: /ɪmˈpɑndərəbəl/ ,(im pon′dər ə bəl)

WordReference Random House Learner's Dictionary of American English © 2025

im•pon•der•a•ble /ɪmˈpɑndərəbəl/   adj. 

1. that cannot be precisely measured or evaluated:
   Imponderable factors may influence the results.

n. [countable]

2. something imponderable:
   Her candidacy in the presidential race is another imponderable.

See -pend-.

WordReference Random House Unabridged Dictionary of American English © 2025

im•pon•der•a•ble  (im pon′dər ə bəl), adj. 

1. not ponderable;
   that cannot be precisely determined, measured, or evaluated.

n. 

2. an imponderable thing, force, agency, etc.

• Medieval Latin imponderābilis. See im-², ponderable
• 1785–95

im•pon′der•a•bil′i•ty, im•pon′der•a•ble•ness, n. 
im•pon′der•a•bly, adv. 

Collins Concise English Dictionary © HarperCollins Publishers::

imponderable / ɪmˈpɒndərəb^əl -drəb^əl/ adjective

1. unable to be weighed or assessed

noun

1. something difficult or impossible to assess

imˌponderaˈbility, imˈponderableness noun

imˈponderably adverb