sigillatim
From LSJ
Ζῆν οὐκ ἄξιος, ὅτῳ μηδὲ εἷς ἐστι χρηστὸς φίλος → Life is not worth living if you do not have at least one friend.
Latin > English (Lewis & Short)
sĭgillātim: v. singillatim.
Latin > French (Gaffiot 2016)
sigillātim, v. singillatim.
Latin > English
sigillatim ADV :: one by one, singly, separately