Enormous (pronounced ih-nawr-muhs)
(1) Greatly
exceeding the common size, extent; huge; immense.
(2) Outrageous
or atrocious; extremely wicked; heinous (archaic).
1525-1535: From the Latin ēnormis (irregular, unusual, enormous, immense out of rule, shapeless, extraordinary, very large), an assimilated form of ex- (out of, away) + norma (rule, norm, pattern) + the English –ous substituted for the Latin -is. The modern meaning (extraordinary in size; very big) is attested from 1540s, the original sense was "outrageous" and more obviously preserved in enormity. The earlier spelling from the mid-fifteenth century was enormyous (exceedingly great, monstrous). The –ous suffix is from the Middle English -ous, from the Old French –ous & -eux, from the Latin -ōsus (full, full of); A doublet of -ose in an unstressed position. It was used to form adjectives from nouns, to denote possession or presence of a quality in any degree, commonly in abundance. In chemistry, it has a specific technical application, used in the nomenclature to name chemical compounds in which a specified chemical element has a lower oxidation number than in the equivalent compound whose name ends in the suffix -ic. For example sulphuric acid (H2SO4) has more oxygen atoms per molecule than sulphurous acid (H2SO3). Synonyms include colossal, excessive, gargantuan, gigantic, huge, humongous, immense, mammoth, massive, monstrous, prodigious, vast, astronomic, gross & jumbo. Enormous is an adjective, enormously is the adverb and enormousness the noun.
Enormity (pronounced ih-nawr-mi-tee)
(1) Outrageous or heinous character; atrociousness; as an
offense; extreme wickedness.
(2) Greatness of size, scope, extent, or influence; immensity (archaic).
1425–1475: From the Late Middle English enormite & ēnorme (monstrous or unnatural act; enormity), from the Old French énormité (extravagance, atrocity, heinous sin), from the Latin enormitatem, nominative ēnormitās (irregularity, enormity, hughness), the construct being ēnōrmis (irregular, unusual, enormous, immense out of rule, shapeless, extraordinary, very large) + -itās (the suffix forming nouns indicating states of being). The –ity suffix was from the French -ité, from the Middle French -ité, from the Old French –ete & -eteit (-ity), from the Latin -itātem, from -itās, from the primitive Indo-European suffix –it. It was cognate with the Gothic –iþa (-th), the Old High German -ida (-th) and the Old English -þo, -þu & -þ (-th). It was used to form nouns from adjectives (especially abstract nouns), thus most often associated with nouns referring to the state, property, or quality of conforming to the adjective's description. Synonyms include depravity, horror, magnitude, abomination, atrociousness, atrocity, crime, disgrace, evil, evilness, grossness, heinousness, monstrosity, nefariousness, outrage, outrageousness & rankness. The noun plural is enormities.
Lindsay Lohan with enormous inflatable toy zebra, V Magazine's Black and White Ball, Standard Hotel, New York, September 2011.
Enormity is a classic case study in (1) meaning adoption in English and (2) why such changes should be accepted where, whatever the etymological tradition, the new meaning makes more sense than the old and good replacement words exist to service the previous meaning. The modern convention is that enormous means “extreme” in the sense of a pure, neutral measure of dimension and enormity means “extremely heinous or wicked; most awful”. Enormity being often used as a synonym for "enormousness," rather than "great wickedness" means the potential exists to confuse readers where the intended meaning may not be otherwise derived from context. There are pedants on both sides (1) those who point to the different roots in French, and radically different accepted meanings and (2) those who note the same source in Latin and the long pattern of use in English. While it’s true enormity has continuously and frequently been used in the sense of “physical or dimensional immensity” since the eighteenth century, it’s really not helpful given that “enormous” exists and meaning will always be clear. It’s true that examples do exist where enormity can, without apparently being misleading, serve to describe both the scale and atrociousness of the holocaust or the gulag but it’s true also that there are examples where it might provoke misunderstanding: given the troubled history, one should not speak of the enormity of the Congo were one intending to allude to it being a vast land mass.
Thematic consistancy: Lindsay Lohan at home, Venice Beach, California, June, 2011. On the wall is one of two enormous images of Lindsay Lohan which decorate the triplex.