- Definitions|1
- Thesaurus|146
- Abbreviations|0
| disastrously(adverb, by bad luck) | |
| dismally(adverb, by bad luck) | |
| distressfully(adverb, cause great distress) | |
| distressingly(adverb, cause great distress) | |
| dolorously | |
| fatefully(adverb, unfortunately) | |
| gravely | |
| heartbreakingly(adverb, cause great distress) | |
| heartrendingly(adverb, cause great distress) | |
| horribly(adverb, by bad luck) | |
| pitifully | |
| regrettable | |
| remorsefully(adverb, alas) | |
| sad to say(adverb, with sadness) | |
| shame | |
| sorry | |
| threateningly | |
| tragical(adverb, cause great distress) | |
| tragically(adverb, cause great distress) | |
| unsuccessfully(adverb, by bad luck) |
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| APA | Smart Define. (2015). regrettably thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/regrettably/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "regrettably thesaurus" https://smartdefine.org/regrettably/thesaurus/synonyms (accessed September 22, 2026). |
| Harvard | Smart Define 2015, regrettably thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/regrettably/thesaurus/synonyms>. |
| MLA | Smart Define. "regrettably thesaurus" 14 April 2015. Web. 22 September 2026. <https://smartdefine.org/regrettably/thesaurus/synonyms> |