Answer: lustrum

AnswerCrossword Clue
LUSTRUMHalf a decade
LUSTRUMPeriod of five years.
LUSTRUMFive-year period.
LUSTRUMFive-year period
lustrumlustration or ceremonial purification of the people, performed every five years, after the taking of the census
lustruma ceremonial purification of the people in ancient Rome
lustrumperiod of five years