-an-

-an- makes someone who belongs. urbo gives urbano, vilaĝo gives vilaĝano, Kristo gives kristano, and sama ideo gives samideano, the fellow traveller word Esperantists use of each other. The output is a noun in -o, and it lives as a free word too: ano on its own means a member.

The nuance is membership rather than conviction. Set it against -ist-: an -ano is inside the group, an -isto argues for the idea. It also names the people of a place, so Usono gives usonano and Eŭropo gives eŭropano; the adjectives usona and eŭropa need no -an- at all, just the -a ending on the place root. As ever the letters lie sometimes: infano, pano, mano and plano are single roots with no suffix in them at all.