idyll

Concise Oxford English Dictionary © 2008 Oxford University Press:
idyll /ˈɪdɪl/ (also idyl)

▶noun

• 1 a blissful or peaceful period or situation.

• 2 a short poem or prose work describing a picturesque pastoral scene or incident.

– derivatives
idyllic adjective,
idyllically adverb.

– origin C16: from L. idyllium, from Gk eidullion, dimin. of eidos ‘form’.