give oneself over to (verb) buckle down: work very hard
Sinonime: animation, buoyancy, cheerfulness, cheeriness,
comfort,
delight,
encouragement,
exuberance,
gaiety, geniality, gladness, glee, good cheer, hilarity, hopefulness, jauntiness, jocundity,
joy, joyousness, lightheartedness, liveliness, merriment, merry-making, mirth,
optimism,
solaceAntonime: depression,
gloom,
gravity,
melancholy,
sadness,
seriousness,
unhappiness