In the present paper we aim at bringing the issue of internalization/appropriation again into discussion, exploring possibilities and limits of such terms, departing from an analysis of the notions historically condensed and stabilized in such words, and commenting on the ways they merge in the cultural-historical perspective. We focus on some inherent contradictions which provoke theoretical difficulties and require conceptual refinement. We show how internalization/appropriation has usually implied the notions of accomplishment and adequacy in the incorporation of social practices, being inevitably positively oriented. We analyze how the (im)proper and the (im)pertinent - hence, the inappropriate - in such practices might be seen as locus of resistance, mobility and change, arguing for the need of considering appropriation as an essentially relational category.