blacken

verb

black·​en ˈbla-kən 

blackened; blackening

ˈblak-niŋ, 

ˈbla-kə- 

intransitive verb

: to become dark or black

the sky blackens

transitive verb

1

: to make black

2

: defame, sully

blackened her reputation

blackener

ˈblak-nər, 

ˈbla-kə- 

noun

Synonyms of blacken

• stain
• dirty
• besmirch
• sully

Examples of blacken in a Sentence

Fire had blackened the field.

The sky blackened as the storm approached.

Their false accusations failed to blacken my reputation.

a presidency blackened by scandal

Recent Examples on the Web

The Israeli strikes on oil facilities sparked massive pillars of fire and blackened the skies above Tehran. —Npr Staff, NPR, 11 Mar. 2026

Once a sky-blue democracy is restored, may Trump’s days of infamy be ruled illegitimate and his name and legacy duly tainted by all of history, darkly blackened or cautiously reddened in the honest records that this twerp and his twisted cohorts have conspired so heinously to whitewash. —Voice Of The People, New York Daily News, 8 Mar. 2026

After Mitchell’s arrest, the sheriff’s department released a photo of him, handcuffed, his face still blackened. —USA Today, 8 Mar. 2026

The Sepulveda Basin has seen numerous brush fires in recent years, with the most being the Burbank fire in August 2024, which blackened 75 acres of almost entirely invasive, nonnative plants. —Daily News, 7 Mar. 2026

Word History

Etymology

Middle English blaknen, blakenen, from blak black entry 1 + -n, -en -en entry 2

First Known Use

14th century, in the meaning defined at intransitive sense

Rhymes for blacken

• bracken
• lakin
• slacken

Kids Definition

blacken

verb

black·​en ˈblak-ən 

blackened; blackening ˈblak-(ə-)niŋ 

1

: to make or become dark or black

2

: to hurt the reputation of

blackener

-(ə-)nər 

noun