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rigi-, rig- (Latin: stiff, hard, numb).


calcium rigor:
corrigible:
de rigueur:
dirigible:
frigid:
frigidity:
heat rigor:
incorrigible:
regescent:
regiment:
rigid:
rigidify:
rigidity:
rigidness:
rigor:
rigor mortis:
rigorism:
rigorist:
rigorous:
rigorously:
rigour:
water rigor: