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in·for·mal

informal

 
 
pronunciation:
In for ml
features:
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part of speech: adjective
definition 1: casual; without ceremony.
They would not allow him into the ball in informal dress.
synonyms:
casual
antonyms:
formal, stiff
similar words:
everyday, natural, offhand, plain, simple
definition 2: used often and correctly in everyday conversation or casual writing.
He told the class not to use informal language in their essays.
similar words:
common, everyday, familiar
derivation: informally (adv.)
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Word Parts  About this feature
The word informal contains the following parts:
in-2 Latin prefix that means not, without
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The prefix in-2 occurs in Latin loanwords and attaches to Latinate bases. The bases of most words prefixed with in-2 are independent adjectives (inadvertent, incognizant), although the base adjective may no longer be in widespread use (as with incessant ). Exceptions include iniquitous and indignant . -in2 has multiple forms, as the 'n' sound in in-2 assimilates to the initial sound of the base to which it is attached. See the assimilated forms ig-, il-2, im-2, and ir-2.
form Latin root that means shape, form