| attempted | (adjective) tried unsuccessfully | - |
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| attendant | (adjective) being present (at a meeting or event, etc.) | - |
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| (adjective) occurring with or following as a consequence | Synonyms: accompanying, collateral, concomitant, consequent, ensuant, incidental, resultant, sequent |
| attended | (adjective) playing or singing with instrumental or vocal accompaniment | Synonyms: accompanied |
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| (adjective) having a caretaker or other watcher | Synonyms: tended to |
| attending | (adjective) giving practical help to | Synonyms: ministrant |
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| attentional | (adjective) of or relating to attention | - |
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| attentive | (adjective) (often followed by `to') giving care or attention | - |
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| (adjective) taking heed; giving close and thoughtful attention | Synonyms: heedful, paying attention, thoughtful |
| attenuate | (adjective) reduced in strength | Synonyms: attenuated, faded, weakened |
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| attenuated | (adjective) reduced in strength | Synonyms: attenuate, faded, weakened |
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| (adjective) of an electrical signal; reduced in amplitude with little or no distortion | - |
| attested | (adjective) established as genuine | Synonyms: authenticated, documented |
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