17.2.1 Formation of an adverb on the basis of an adjective
An adverb on the basis on an adjective is formed by adding the suffix -mente to the feminine form. The possibility to form an adverb based on an adjective exists as well in English (slow => slowly) but is not as productive as in Italian.
masculine form
feminine form
suffix
adverb
meaning
lento
lenta
+ mente
lentamente
slowly
sicuro
sicura
sicuramente
sure
caro
cara
caramente
nice
ricco
ricca
riccamente
rich
furioso
furiosa
furiosamente
angry
If there is no feminine form at all, that's the case if the adjective ends on e, mente is simple added to the adjective.
