Go to 'thermo-' entry Go to 'dino-' entry Go to 'chondro-' entry Go to 'aero-' entry Go to '-logy' entry Go to 'thaumato-' entry Go to 'nano-' entry Go to '-sophy' entry Go to 'bucco-' entry Go to '-ism' entry Go to '-lysis' entry Go to 'galacto-' entry Go to '-anthropy' entry Go to 'pneumo-' entry Go to '-ploitation' entry Go to '-lithic' entry Go to '-sepalous' entry Go to 'onco-' entry Go to '-parous' entry Go to 'dermato-' entry Go to 'multi-' entry Go to 'dodeca-' entry Go to '-zoon' entry Go to 'vermi-' entry Go to 'crystallo-' entry Go to 'biblio-' entry Go to 'eco-' entry Go to 'juxta-' entry Go to 'facio-' entry
Affixes: the building blocks of English
Affixes: the building blocks of English

in-1 Also il-, im-, and ir-.

Not; without.

[Latin in-.]

This prefix is added to adjectives to give a negative sense (infertile, inarticulate, inexpensive, invariable) and to nouns to indicate a lack of something (inattention, incapacity, insensitivity). Many examples exist, but in- is not a living form, new words instead being created using un-, to which it is closely related in sense. There is no clear rule deciding which should be used: see un- for more information. See also the next entry.

The prefix is spelled il- before stems beginning in l (illegitimate, illiberal), im- before b, m, and p (imbalance, immoral, impossible), and ir- before r (irrational, irregular).

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