In my last post I covered the basics of comparing regular adjectives. Participles decline as regular adjectives when they are compared, whether they be present active (patiēns, patient) or perfect passive (apertus, open).
- amans (stem ament-) / amantior, -ius / amantissimus, -a, -um (loving)
- rabiens (stem rabient-) / rabientior, -ius / rabientissimus, -a, -um (raving)
- nescitus, -a, -um (stem nescito-) / nescitior, -ius / nescitissimus, -a, -um (ignorant)
- olfactus, -a, -um (stem olfacto-) / olfactior, -ius / olfactissimus, -a, -um (sniffed)
A related phenomenon occurs with compound adjectives ending in -dicus, -volus, and -ficus (from dīcō, volō, and faciō). These compounds in fact take the stem of their related present active participle (dīcens, volens, faciens) in place of other endings.
- maledicus, -a, -um / maledīcentior, -ius / maledīcentissimus, -a, -um (slanderous)
- benevolus, -a, -um / benevolentior, -ius / benevolentissimus, -a, -um (well-wishing)
- māgnificus, -a, -um / māgnificentior, -ius / māgnificentissimus, -a, -um (grand)
The Essential AG: 124a, 127