-ero
Noun-forming suffix indicating an occupation, agency or state of being.
From Latin -arius 'id.'
From Proto-Italic *-ārio- 'id.' From Proto-Indo-European *-eh2-r-i̯o-
Romance
Asturian -ariu, Portuguese -áriu, Galician -eiro, Catalan -er, French -ier, Italian -aio, Aromanian -ar, Romanian -ar
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