- Definitions|1
- Thesaurus|146
- Abbreviations|0
| unfortunately(adverb, regret, sadly, unhappily, alas) | |
| alas(adverb, unfortunately, unhappily, unluckily, with sadness) | |
| sadly(adverb, gloomily, miserably, unfortunately, alas) | |
| unluckily(adverb, gloomily, miserably, unfortunately, unhappily) | |
| lamentably(adverb, gloomily, miserably, unfortunately, by bad luck) | |
| grievously(adverb, by bad luck, cause great distress) | |
| unhappily(adverb, gloomily, miserably, unfortunately, drearily) | |
| woefully(adverb, with sadness, cause great distress) | |
| deplorably(adverb, cause great distress) | |
| regretfully(adverb, alas) | |
| miserably(adverb, by bad luck) | |
| pitiably | |
| sad to relate(adverb, with sadness) | |
| acutely | |
| afraid | |
| badly | |
| critically | |
| dangerously | |
| decidedly | |
| deplorable |
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| APA | Smart Define. (2015). regrettably thesaurus. Retrieved September 20, 2026, from https://smartdefine.org/regrettably/thesaurus/synonyms |
| Chicago | Smart Define. 2015. "regrettably thesaurus" https://smartdefine.org/regrettably/thesaurus/synonyms (accessed September 20, 2026). |
| Harvard | Smart Define 2015, regrettably thesaurus, Smart Define, viewed 20 September, 2026, <https://smartdefine.org/regrettably/thesaurus/synonyms>. |
| MLA | Smart Define. "regrettably thesaurus" 14 April 2015. Web. 20 September 2026. <https://smartdefine.org/regrettably/thesaurus/synonyms> |