1. in a way that cannot be determined, decided, or fixed with certainty
Usage: formal; often used in philosophical, legal, or technical contexts

Examples

• The exact date of the ancient artifact remains indeterminably lost to history.
• The contract's terms were written so vaguely that the obligations were indeterminably unclear.
• The boundary between the two properties extended indeterminably into the forest.
• Her motives seemed indeterminably mixed between genuine concern and self-interest.
• The philosophical question of free will remains indeterminably debated among scholars.