dilettoso

From diletto +‎ -oso.

dilettoso (feminine dilettosa, masculine plural dilettosi, feminine plural dilettose)

1. (literary) pleasant, delightful, delectable
   • mid 1300s–mid 1310s, Dante Alighieri, “Canto I”, in Inferno [Hell]‎, lines 76–78; republished as Giorgio Petrocchi, editor, La Commedia secondo l'antica vulgata [The Commedia according to the ancient vulgate]‎, 2^nd revised edition, Florence: publ. Le Lettere, 1994:

     Ma tu perché ritorni a tanta noia? / perché non sali il dilettoso monte / ch’è principio e cagion di tutta gioia?

     But why do you go back to such anguish? Why don't you climb the delightful mount which is the source and cause of every joy?

• dilettosamente

• dilettoso in Treccani.it – Vocabolario Treccani on line, Istituto dell'Enciclopedia Italiana