indeterminable

[ in-di-tur-muh-nuh-buh l ]

/ ˌɪn dɪˈtɜr mə nə bəl /

not determinable; incapable of being ascertained.

incapable of being decided or settled.

Origin of indeterminable

From the Late Latin word indēterminābilis, dating back to 1480–90. See in-³, determinable

in·de·ter·mi·na·ble·ness, noun in·de·ter·mi·na·bly, adverb

The factors of safety are indeterminable; the duplications of their internal mechanisms are conjectural, variable.

Breaking Point |James E. Gunn
The Unspeakable Perk turned and regarded him fixedly; but, owing to the goggles, the expression was indeterminable.

The Unspeakable Perk |Samuel Hopkins Adams
A contingency is simply an indeterminable future event, which may or may not be attended with danger or risk.

English Synonyms and Antonyms |James Champlin Fernald
Langley seemed prepared for anything, even for an indeterminable number of universes interfused--physics stark mad in metaphysics.

The Education of Henry Adams |Henry Adams

In other words, with an indeterminable future it has had a determinable past.

Studies in the Out-Lying Fields of Psychic Science |Hudson Tuttle

indeterminable

/ (ˌɪndɪˈtɜːmɪnəbəl) /

incapable of being ascertained

incapable of being settled

indeterminableness, noun indeterminably, adverb