From Cassell's Latin Dictionary

bis, adv. twice, in two ways; bisterque, Cic.; bis t'Tvo, Cic.; twice or thrice; bis die, Cic. ; bis consul, a man who has been consul twice (iternm consul, a man who is consul for the second time), Cic.; bis tanto or tantum, twice as great, Plaut.; with distributive numerals, bis bina, Cic.; with cardinal numerals, only in poet., bis quinque viri

Pete

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