Found 2 items, similar to indeterminably.
English → English (WordNet) Definition: indeterminably indeterminably adv : in an indeterminable manner; “their relationship was of an indeterminably vague nature”
English → English (gcide) Definition: Indeterminably Indeterminable \In`de*ter"mi*na*ble\, a. [L. indeterminabilis: cf. F. ind['e]terminable. See In- not, and Determine.] Not determinable; impossible to be determined; not to be definitely known, ascertained, defined, or limited. -- In`de*ter"mi*na*bly, adv. [1913 Webster]