quodsi
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.
quod-sī, s. 1. quodno. I, 2.
quodsi CONJ :: but if; and if; (introduces conditional); (quodsi = quod si)