lilt

Short definition from Wiktionary

Verb

1. 1
   To do something rhythmically, with animation and quickness, usually of music.
2. 2
   To sing cheerfully, especially in Gaelic.
3. 3
   To utter with spirit, animation, or gaiety; to sing with spirit and liveliness.

Noun

1. 1
   Animated, brisk motion; spirited rhythm; sprightliness.
2. 2
   A lively song or dance; a cheerful tune.
3. 3
   A cheerful or melodious accent when speaking.