illegitimate
adjective
il·le·git·i·mate
ˌi-li-ˈji-tə-mət
1
a
: not recognized as lawful offspring
b
: born of parents not married to each other
2
a
: not sanctioned by law : illegal
b
: not authorized by good usage
c
of a taxon
: published but not in accordance with the rules of the relevant international code
3
: not rightly deduced or inferred : illogical
4
: departing from the regular : erratic
illegitimately
adverb
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Merriam-Webster unabridged
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