unknowableness
构词拆分
unknowable词根/词干
+
-ness后缀
Appended in general, often informally, stylistically, or jocularly, for reification of an attribute. · Appended to adjectives to form nouns meaning "the state of being (the adjective)", "the quality of being (the adjective)", or "the measure of being (the adjective)".
词源说明
From unknowable + -ness.