corollary
UK[kəˈrɒləri]US[ˈkɔːrəleri]
n
a proposition that follows from (and is often appended to) one already proved.
n
a direct or natural consequence or result.
Morpheme Breakdown
cor
oll
ary
cor
with
oll
to nourish, to grow
ary
pertaining to
Etymology
the word 'corollary' entered english in the late 14th century from latin 'corollarium', which originally meant 'money paid for a garland' or 'a gratuity'. this latin term derives from 'corolla', a diminutive of 'corona' meaning 'crown' or 'garland'. the semantic evolution is logical: a garland was an extra ornament or a bonus gift. from this concrete sense of 'something extra', the meaning shifted in medieval latin to the logical and mathematical sense of 'a proposition that follows as an extra from one already proven'. the morphemic breakdown reflects this idea of something that grows ('olere') together with ('cor-') a main argument, pertaining to ('-ary') it as a natural consequence.
Analysis
Structure: cor (with) + oll (to nourish, to grow) + ary (pertaining to)
cor- (latin prefix 'com-', meaning 'with' or 'together'); -oll- (from latin 'olere', a verb meaning 'to nourish' or 'to grow'); -ary (latin adjectival suffix '-arius', meaning 'pertaining to' or 'connected with').
Examples
if two angles of a triangle are equal, the corollary is that the sides opposite them are also equal.
a corollary of increased economic prosperity is often a rise in consumer spending.
the author presented his main theory and then listed several important corollaries that flowed from it.