Anything arbitrary, such as an arithmetical value or a fee.
Not representative or symbolic; not iconic.
Determined by independent arbiter.
Determined by impulse rather than reason; heavy-handed.
Based on individual discretion or judgment; not based on any objective distinction, perhaps even made at random.
Any, out of all that are possible.
Conscious or having knowledge of something.
Vigilant or on one's guard against danger or difficulty.