A soldier who is not a member of an official military force and who may not use regular army tactics.
One who does not regularly attend a venue.
without symmetry, regularity, or uniformity
rough
not regular; having sides that are not equal or angles that are not equal
whose faces are not all regular polygons (or are not equally inclined to each other)
nonstandard; not conforming to rules or expectations
not following the regular or expected patterns of inflection in a given language
One who is opposed or objects (to a policy, course of action or set of ideas).
The participant who opens an academic debate by putting forward objections to a theological or philosophical thesis.
One who opposes another; one who works or takes a position against someone or something; one who attempts to stop the progress of someone or something.
One who opposes another in words (in a dispute, argument or controversy).
One who opposes another physically (in a fight, sport, game, or competition).