underivable en · ADJ
Etymology
From un- + derivable.
Meanings
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(not-comparable) That cannot be derived.
[B]eautiful women […] seem, for a long interval, mysteriously exempt from the incantations of decay; for as the outward loveliness touch by touch departs, the interior beauty touch by touch replaces that departing bloom, with charms, which, underivable from earth, possess the ineffaceableness of stars.
1852, Herman Melville, Pierre; or The Ambiguities: