armonic-dezarmonic
a incaleca-a descaleca
perfect-imperfect
a mosteni-a dezmosteni
expresiv-neexpresiv
matur-imatur
a credita-a discredita
a conecta-a deconecta
precizie-imprecizie
abilitate-inabilitate
a coase-a descoase
rational-irational
ordine-dezordine
fidel-infidel
facere-desfacere
favorabil-defavorabil
probabil-improbabil
avantaj-dezavantaj
productiv-neproductiv