Deradical

The pattern in (20) is best desctibed as deverbal, in contrast to the deradical pattern in (21) and (22).

Source: wiktionary

Vedic -dhyai, as just alluded to, has been considered by many distinguished scholars to be a deradical rather than a depresential suffix, except in a few special forms.

Source: wiktionary

The deradical derivation of the key elements of the C[aland ]S[ystem] reveals the origin of the system within PIE: as summarized by Rau (2009: 127–131), the Caland System is ultimately based on derivational processes starting from root nouns.

Source: wiktionary