unsearchableness en · NOUN
Etymology
From unsearchable + -ness.
Meanings
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(uncountable) The quality of being unsearchable.
[…] now appeal, now despair, now prayer, now trust in the gods, now the unsearchableness of the mind of Zeus, the all-seeing Father […]
1924, Herbert Weir Smyth, “II. The Suppliant Maidens”, in Aeschylean Tragedy, page 39: