-dero , ra . ( Of the lat. )( -torius ). 1. suf. Forms nouns and verbal adjectives. Appears in the Forms -adero,-edero,-idero, according to the verb base is the first, second or third conjugation. Dashboard, drying rack, forthcoming. 2. suf. In the adjectives means 'possibility' and sometimes 'need'. Casadero, long-lasting, perishable, coming, feasible.