Imprescriptible /(?)/
Im·pre·scrip·ti·ble
Imprescriptible
a.
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Not capable of being lost or impaired by neglect, by disuse, or by the claims of another founded on prescription; -- of rights.
The right of navigation, fishing, and others that may be exercised on the sea, belonging to the right of mere ability, are imprescriptible.
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Not derived from, or dependent on, external authority; self-evidencing; obvious.
The imprescriptible laws of the pure reason.