"spry" in the adjective sense
1. agile, nimble, quick, spry
moving quickly and lightly
"sleek and agile as a gymnast"
"as nimble as a deer"
"quick of foot"
"the old dog was so spry it was halfway up the stairs before we could stop it"
Source: WordNet® (An amazing lexical database of English)
Princeton University "About WordNet®."
WordNet®. Princeton University. 2010.
View WordNet® License