What is the meaning of -ero?

Used to form adverbs from nouns of time; every, each

Denotes a particle of something.

Forms certain sound-symbolic or diminutive nouns.

Forms certain pejorative nouns.

suffix denoting a person occupied in a customary though not professional activity or occupation

suffix denoting an animal or other thing with a characteristic action

forms nouns from nouns, denoting a professional occupation; -er, -eer

Suffix that forms nouns and adjectives from nouns.

forms occupations and other agent nouns from nouns

forms objects designed for use with another object

forms tree names from their fruit

forms places where collections can be found

forms adjective from nouns denoting the qualities of the noun

forms occupations and other agent nouns from nouns

Source: wiktionary.org