Eager and enthusiastic willingness.
Late middle english: from old french alacrité, from alacer "lively", from latin alacer "brisk, eager".
- He accepted the invitation with alacrity.
- The staff approached their tasks with alacrity.
- She showed alacrity in learning the new software.
- He completed the work with great alacrity.
- The team accepted the challenge with alacrity.