What does -ce mean in Latin?

-ce, a suffix, means “affixed, usually to demonstratives, forming deixes; suffixed to demonstratives hic, iste and ille for emphasis.”.

How do you pronounce -ce?

In classical Latin, [ˈkɛ]; in ecclesiastical (church) Latin, [ˈt͡ʃɛː].

suffix

-ce (particle)

Classical[ˈkɛ]Ecclesiastical[ˈt͡ʃɛː]

morphemeparticleaffixed, usually to demonstratives, forming deixes
ce- + -do → cedo
ec- + -ce → ecce
Old Latinmorphemeparticlesuffixed to demonstratives hic, iste and ille for emphasis.
hic + -ce → hice
[…] mando tibi, Mani, uti illace suovitaurilia fundum agrum terramque meam […] uti cures lustrare.I offer to you, Manius, this suovetaurilia so that you will care to purify the ground, the field and my land.234 BCE – 149 BCE, Marcus Porcius Cato, De agri cultura 141.1

From Proto-Italic *ke, from Proto-Indo-European *ḱe (“here”).