verb/enneɡɾeˈθeɾ/
to blacken, go dark, darken
Synonyms: ensombrecer, oscurecer
Antonyms: emblanquecer, blanquear
Related: ennegrecimiento
From en- + negro + -ecer (verbal suffix). Cf. also negrecer, Latin nigresco, nigrescere. Compare Portuguese enegrecer, Catalan ennegrir, ennegreixo, Italian annerire, annerisco, French noircir, noircis, Romanian înnegri, înnegresc.