irregular
adjective
[ ɪˈrɛɡjʊlə ]
• not even or balanced in shape or arrangement.
• "his strong, irregular features"
Similar:
asymmetrical,
non-uniform,
uneven,
crooked,
misshapen,
lopsided,
contorted,
twisted,
twisting,
serpentine,
curving,
broken,
jagged,
ragged,
craggy,
serrated,
sawtooth,
saw-edged,
notched,
nicked,
indented,
rough,
bumpy,
coarse,
pitted,
rutted,
rutty,
holed,
holey,
lumpy,
knobby,
knobbly,
gnarled,
• contrary to the rules or to that which is normal or established.
• "their involvement in irregular financial dealings"
Similar:
against the rules,
contrary to the rules,
out of order,
improper,
incorrect,
illegitimate,
unscrupulous,
unethical,
unprofessional,
unofficial,
back-door,
grey,
not done,
unacceptable,
wrong,
beyond the pale,
unorthodox,
unconventional,
off-centre,
abnormal,
not on,
a bit much,
shady,
a bit thick,
off,
not cricket,
over the fence,
• (of a verb or other word) having inflections that do not conform to the usual rules.
irregular
noun
• a member of an irregular military force.
• an imperfect piece of merchandise sold at a reduced price.
Origin:
late Middle English (in the sense ‘not conforming to rule (especially that of the Church’)): via Old French from medieval Latin irregularis, from in- ‘not’ + regularis (see regular).
