rarefacio
From LSJ
οὐ μακαριεῖς τὸν γέροντα, καθ' ὅσον γηράσκων τελευτᾷ, ἀλλ' εἰ τοῖς ἀγαθοῖς συμπεπλήρωται· ἕνεκα γὰρ χρόνου πάντες ἐσμὲν ἄωροι → do not count happy the old man who dies in old age, unless he is full of goods; in fact we are all unripe in regards to time
Latin > English (Lewis & Short)
rārē-făcĭo: (written also separately rārē făcĭo), fēci, factum, 3, v. a. rarus,
I to make thin or rare, to rarefy (Lucret.): rarefieri, Lucr. 1, 648: rarefacta, id. 2, 1139; 3, 442: rareque facit, id. 6, 233; 870.
Latin > French (Gaffiot 2016)
rārēfăcĭō,¹⁴ fēcī, factum, ĕre (rarus, facio), tr., raréfier : Lucr. 6, 233