1288: Esquivalience Jun 20, 2018

Words have been added to dictionaries erroneously before, called 'ghost-words', but sometimes fake words are included to be able to later prove if there has been copyright-infringement. The Oxford English Dictionary (OED) describes 'esquivalience' as "the willful avoidance of one's official responsibilities", which is certainly a useful word, but it completely made up. Given that ultimately what dictionaries do is to describe the same words that every other one describes too, it can be tricky to catch when some company has stolen any entries, but both Dictionary.com and Google have had entries for 'esquivalience', indicating that they took, at least to some extent, from the OED, having fallen into their trap.
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