informal
UK[ɪnˈfɔːm(ə)l]US[ɪnˈfɔːrm(ə)l]
adj
Having a relaxed, friendly, or unofficial style or manner; not formal.
adj
(of language) Used in ordinary conversation but not in formal speech or writing.
Morpheme Breakdown
in
formal
in
not
formal
formal
Etymology
The word 'informal' is a straightforward negation built upon the adjective 'formal'. 'Formal' itself traces back to the Latin formalis, meaning "of or pertaining to form", derived from forma, meaning "shape, mold, or pattern". The Latin forma is of uncertain origin, possibly from Greek morphē (form, shape). The prefix 'in-', from Latin, is a productive negative marker. Thus, the literal construction "not formal" directly and logically yields the modern meanings of relaxed, unofficial, or not conforming to prescribed conventions.
Analysis
Structure: in (not) + formal (formal)
- in: A prefix of Latin origin, meaning "not" or "without". It functions as a negative particle in this word.
- formal: An adjective of Latin origin (from formalis), meaning "according to established form or custom". It is the core lexical root.
Examples
The meeting was informal, with everyone dressed casually.
He uses informal language when chatting with friends.
We have an informal agreement to share the costs.