indeterminably

英[ɪndɪ'tɜːmɪnəblɪ] 美[ɪndɪ'tɜːmɪnəblɪ]
  • adv. 无法决定地
Adverb:
  1. in an indeterminable manner;

    "their relationship was of an indeterminably vague nature"