Etymology

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nigra (black) +‎ -igar, Esperanto nigrigi.

Verb

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nigrigar (present tense nigrigas, past tense nigrigis, future tense nigrigos, imperative nigrigez, conditional nigrigus)

  1. (transitive) to blacken, make black, turn black

Conjugation

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Antonyms

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  • blankigar (to whiten, make white, turn white)
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  • nigreskar (to blacken, turn black) (intransitive)