alacrity
noun
[ əˈlakrɪti ]
• brisk and cheerful readiness.
• "she accepted the invitation with alacrity"
Similar:
eagerness,
willingness,
readiness,
enthusiasm,
ardour,
fervour,
keenness,
joyousness,
liveliness,
zeal,
promptness,
haste,
briskness,
swiftness,
dispatch,
speed,
address,
Origin:
late Middle English: from Latin alacritas, from alacer ‘brisk’.