indeterminably


in·de·ter·min·a·ble

I0100300 (ĭn′dĭ-tûr′mə-nə-bəl)adj.1. Impossible to fix or measure: indeterminable traces of poison; indeterminable assets.2. Impossible to settle or decide with finality: indeterminable questions.
in′de·ter′min·a·bly adv.
Thesaurus
Adv.1.indeterminably - in an indeterminable manner; "their relationship was of an indeterminably vague nature"