1
adamantly(adverb, in a bad way)
1
bluntly(adverb, insensitively)
1
brutally
1
chickenheartedly
1
cold-heartedly
1
compassionlessly(adverb, in a bad way)
1
coolly(adverb, insensitively)
1
cravenly
1
deadpan
1
dejectedly
1
despairingly
1
despondently
1
discouragedly
1
disheartenedly
1
disinterestedly
1
dispiritedly
1
downheartedly
1
dully
1
faintheartedly
1
flintily
10 years ago|3.3k views|share |citing 
APASmart Define. (2016). heartlessly thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/heartlessly/thesaurus/synonyms
ChicagoSmart Define. 2016. "heartlessly thesaurus" https://smartdefine.org/heartlessly/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2016, heartlessly thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/heartlessly/thesaurus/synonyms>.
MLASmart Define. "heartlessly thesaurus" 24 March 2016. Web. 22 September 2026. <https://smartdefine.org/heartlessly/thesaurus/synonyms>