21
bully
8
darken(verb, dull, unlit, shaded)
4
burden(verb, dull)
4
depress(verb, dull)
4
weigh down(verb, expression, phrasal verb, dull)
3
aggravate(verb, trouble, increase)
3
blacken(verb, dull, enhance, darken)
3
dull
3
increase(noun, verb, trouble, aggravate)
3
intensify(verb, trouble, increase, aggravate)
2
deepen(verb, lower, weaken)
2
dim(verb, dull, clear, obscure, darken)
2
heighten
2
irritate(verb, trouble, increase, aggravate)
2
magnify
2
maximize
2
upset(verb, dull)
1
abash
1
augment
1
befog
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APASmart Define. (2015). lighten thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/lighten/thesaurus/antonyms
ChicagoSmart Define. 2015. "lighten thesaurus" https://smartdefine.org/lighten/thesaurus/antonyms (accessed September 22, 2026).
HarvardSmart Define 2015, lighten thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/lighten/thesaurus/antonyms>.
MLASmart Define. "lighten thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/lighten/thesaurus/antonyms>