rigor - Dictionary definition and meaning for word rigor
rigor can be opposite of vigor(which is physically enthusiastic).
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RIGOR AS IN HINDI ...U R WASHING CLOTHES RAGAR RAGAR KARKE...RIGOR(SEVERITY OF WORK)
Rigor is something to severity as in vigor is something to strenght...plz se them as analogies RIGOR::VIGOR..may be yu cud remember this way!!