quatriduum
From LSJ
Τί κοινότατον; ἐλπίς. καὶ γὰρ οἷς ἄλλο μηδέν, αὕτη πάρεστι → What is most common? Hope. For those who have nothing else, that is always there.
Latin > English (Lewis & Short)
quătrĭdŭum: v. quadriduum.
Latin > French (Gaffiot 2016)
quătrĭdŭŭm,¹⁴ v. quadriduum.
Latin > English
quatriduum quatridui N N :: period of four days; [~o => in the four days from now, within four day of]