| correspondingly | (adverb) in a corresponding manner | - |
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| despondently | (adverb) with desperation | Synonyms: despairingly |
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| irresponsibly | (adverb) in an irresponsible manner | - |
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| outspokenly | (adverb) in an outspoken manner | - |
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| responsibly | (adverb) in a responsible manner | - |
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| spontaneously | (adverb) in a spontaneous manner | - |
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| (adverb) without advance preparation | Synonyms: ad lib, ad libitum, impromptu |
| spookily | (adverb) in an unnatural eery manner | Synonyms: eerily |
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| sporadically | (adverb) in a sporadic manner | Synonyms: periodically |
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| sportingly | (adverb) so as to be sporting; in a sporting manner | - |
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| sportively | (adverb) in a merry sportive manner | - |
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| spotlessly | (adverb) in a spotless manner | - |
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| unsportingly | (adverb) in an unsportsmanlike manner | - |
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