unascertained

Meanings

1. 1
   adj

   not yet determined or established with certainty

   The cause of the fire remained unascertained for weeks.

From un- ('not') + ascertained, past participle of ascertain, from Old French acertener ('to make certain'), from a- ('to') + certain, from Latin certus ('sure, fixed'), from cernere ('to distinguish, decide').

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