What is the meaning of -ery?

Added to occupational etc. nouns to form other nouns meaning the "art, craft, or practice of."

Added to verbs to form nouns meaning "place of" (an art, craft, or practice).

Added to nouns to form other nouns meaning "a class, group, or collection of."

Added to nouns to form other nouns meaning "behavior characteristic of."

Forming adjectives.

deprecative nominative/vocative plural of -er

nominative/accusative/vocative plural of -er

Source: wiktionary.org