-eiro

masculineforms nouns from nouns or verbs, denoting someone who works with the suffixed noun or engages in the suffixed verb; -er; -eer

cozinha (“kitchen”) + -eiro → cozinheiro (“cook”)

masculineforms nouns, from nouns denoting a location or type of location, meaning “someone from the location”

Brasil (“Brazil”) + -eiro → brasileiro (“Brazilian”)

masculineforms nouns from the names of fruits or other plant products, denoting the plant bearing them, usually trees and shrubs

pêssego (“peach fruit”) + -eiro → pessegueiro (“peach tree”)

masculineforms nouns, from nouns or adjectives, denoting a state, property or quality of being the suffixed adjective or having the suffixed noun; -ity, -ness

sujo (“filthy”) + -eira → sujeira (“filth”)

masculineforms nouns, from nouns, denoting a place where there is plenty of the suffixed noun

lama (“mud”) + -eiro → lameiro (“place with a lot of mud”)

masculineforms nouns, from verbs, denoting a place where the suffixed verb is likely to occur

atolar (“to bog down”) + -eiro → atoleiro (“place where vehicles bog down frequently”)

masculineforms the names of trees, often synonyms

carvalho (“oak”) + -eira → carvalheira (“English oak”)

masculineforms nouns from nouns, denoting a container for the suffixed noun

lápis (“pencil”) + -eiro → lapiseiro (“pencil case”)

forms adjectives meaning “of, from or related to the location”

Brasil (“Brazil”) + -eiro → brasileiro (“Brazilian”)

forms adjectives meaning “which transports the suffixed noun”

carga (“cargo; load”) + -eiro → cargueiro (“which transports cargo”)

forms adjectives, from nouns, denoting a fan of the suffixed noun

metal (“heavy metal”) + -eiro → metaleiro (“metalhead (relational)”)