[...] any language [...] must [...] throw countless concepts under the rubric of certain basic ones, using other concrete or semi-concrete ideas as functional mediators. The ideas expressed by these [...] - may be called 'derivational' or 'qualifying'.
- Sapir (1921), a pag.84

When a word [...] contains a derivational element (or word) the concrete significance of the radical element ( 'farm-', 'duck-' ) tends to fade from consciousness and to yield to a new concreteness ( 'farmer', 'duckling' ) that is synthetic in expression rather than in thought.
- Sapir (1921), a pag.84

'Derivational Concepts' (less concrete, as a rule, than I [concrete concepts] , more so than III [concrete relational concepts]) [...]; differ from type I in defining ideas that are irrelevant to the proposition as a whole but that give a radical element a particular increment of significance [...]
- Sapir (1921), a pag.101