| dissimulative | (adjective) concealing under a false appearance with the intent to deceive | - |
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| pessimum | (adjective) of an organism's environment; least favorable for survival | Synonyms: pessimal |
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| simulated | (adjective) not genuine or real; being an imitation of the genuine article | Synonyms: fake, false, faux, imitation |
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| (adjective) reproduced or made to resemble; imitative in character | - |
| simultaneous | (adjective) occurring or operating at the same time | Synonyms: co-occurrent, coincident, coincidental, coinciding, concurrent, cooccurring |
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