To emit a low sound; to warble.
A kind of musical warble.
To unpredictably change state for short periods of time.
To move quickly from one location to another.
To move about rapidly and nimbly.
To move house (sometimes a sudden move to avoid debts).
To be unstable; to be easily or often moved.
To move a tethered animal to a new, grazing location.
A particular, unexpected, short lived change of state.
A fluttering or darting movement.