Imponderable

Word of the Day for Thursday, June 14, 2012

imponderable \im-PON-der-uh-buhl\, noun:

1. A thing that cannot be precisely determined or measured.

adjective:
1. Not ponderable; that cannot be precisely determined, measured, or evaluated.

Of course he had always been a huge imponderable, if not to say the biggest challenge of her admittedly young life.
-- Lindsay Armstrong, The Constantin Marriage

Of course there's always the imponderable, the unpredictable which can't be foreseen...
-- Leonardo Sciascia, Peter Robb and Sacha Rabinovitch, The Moro Affair

Imponderable comes directly from the Medieval Latin word imponderābilis which had the same meaning.

Thanks to: www.dictionary.com