the mind > emotion > pleasure > cheerfulness > [adjective] > light-hearted
lightOE
recklessc1400
lightsomea1425
light-hearted1440
free-hearted1549
unsolicitous1668
jaunty1672
carefree1795
light-heart1802
sans-souciant1826
buoyant-minded1833
cheero1915
viscerotonic1937
funsy1958
1826 W. ScottJrnl. 10 Mar. (1939) 128 I have, in my odd sans souciant character, a good handful of meal from the grist of the Jolly Miller who—once Dwelld on the river Dee.