opinional en · ADJ
Etymology
From opinion + -al.
Meanings
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(not-comparable, rare) Based on or constituting an opinion.
The problem of the “high” personality would not be solved if the investigation stayed on the opinional level, no matter how much more tangible and measurable such results would seem to be.
2019, Theodor W. Adorno, Else Frenkel-Brunswik, Daniel J. Levinson, The Authoritarian Personality, page xlv: