elastic; rebounds readily
quick and energetic
full of zest or vigor
full of spirit; full of life
filled with events or activity
full of life and energy
not having a job
not in active use
without a basis in reason or fact
be idle; exist in a changeless situation
run disconnected or idle
silly or trivial
lacking a sense of restraint or responsibility
not yielding a return
not in action or at work
the state of an engine or other mechanism that is idling
