If an adjective ends in -ale, -ile, or -are, the adverb is formed with the root of the adjective plus the ending -mente.

FORMING ADVERBS FROM ADJECTIVES THAT END IN -ALE, -ILE, OR -ARE
 
ADJECTIVE (GENERAL OR MASCULINE)
 ADJECTIVAL ROOT
 ADVERB
 
esemplare
 esemplari-
 esemplarmente
 
gentile
 gentil-
 gentilmente
 
speciale
 special-
 specialmente