intelligentness

Noun

nonstandard uncountable

(nonstandard) The quality of being intelligent; intelligence.

Japanese Meaning

知性

Despite critics calling the word awkward, the scientist's intelligentness was evident in every experiment she designed.

その言葉をぎこちないと呼ぶ批評家がいても、その科学者の知性は彼女が設計したすべての実験に明らかだった。

Sense（1）

(nonstandard) The quality of being intelligent; intelligence.