In actual french, the suffix -âtre (from the Latin's suffix -asterum) is no longer productive and often its is presented as the marker of negative opinion about the singular occurrence of the property p. Utilizing a morpho-syntaxic and cognitive approch, this analysis sets the objective to formalise suffix's function and show its not nessarily expresses a pejorative opinion. The words pâtre value depends on the suffix and the radical relationship. In deed, the radical introduces p, the referential value, and the suffix actualises p' (other that p) or non-p (opposite to p). The suffix marks the implicite operations settled on the notional level; its constructs the opposition between both values p and p' (or p and non-p) introduced on the same time. According to the nature of actualised value, p' or non-p, the opposition is notional or evaluative. The notional opposition (albâtre, mulâtre) is based on the assertive modality yes/no, which creats the notional domain; its is constructed on existing the relation between the referential value p and the actualized value p' or non-p. The notional opposition attests the objective deformation of p in the single occurrence pâtre, without locutor's premeditation and any pejorative opinion. The notional opposition infers the syntaxic relation of the concession between the co-referential values. The evaluative opposition is constructed from the concret occurrence pâtre located with respect to the referential value p on the referent scale. The property pâtre is caracterized as accomplished on the insufficient degree (jaunâtre) or the excessive degree (opiniâtre) of accomplishment. The notional opposition infers the syntaxic relation of cause-and-effect between the co-referential values. In the both cases, the suffix's use corresponds to the differents dynamics - from the general concept to the single occurrence (notional opposition) or from the single occurrence to the general concept (evaluative opposition).
