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unnatural

un·nat·u·ral

unnatural

pronunciation:
uhn naech rl [or] uhn naech rl
features:
Word Explorer
part of speech: adjective
definition 1: not according to natural laws or processes.
It is unnatural for water to flow uphill.
synonyms:
freak
antonyms:
natural
similar words:
eerie, extraordinary, peculiar, supernatural, uncanny, uncommon, unusual, weird
definition 2: not honest; pretended or artificial.
Kim has an unnatural smile in her school photograph.
synonyms:
artificial
antonyms:
genuine, natural
similar words:
insincere, plastic
derivations: unnaturally (adv.), unnaturalness (n.)
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See
  character, personality