| bad | (adjective) having undesirable or negative qualities | - |
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| (adjective) feeling or expressing regret or sorrow or a sense of loss over something done or undone | Synonyms: regretful, sorry |
| (adjective) reproduced fraudulently | Synonyms: forged |
| (adjective) characterized by wickedness or immorality | - |
| (adjective) capable of harming | - |
| (adjective) below average in quality or performance | - |
| (adjective) serious or severe | Synonyms: big |
| (adjective) not capable of being collected | Synonyms: uncollectible |
| (adjective) not working properly | Synonyms: defective |
| (adjective) nonstandard | - |
| (adjective) (of foodstuffs) not in an edible or usable condition | Synonyms: spoiled, spoilt |
| (adjective) feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad') | Synonyms: tough |
| (adjective) physically unsound or diseased | Synonyms: unfit, unsound |
| (adjective) not financially safe or secure | Synonyms: high-risk, risky, speculative |
| badass | (adjective) being impressive due to extreme attitude or style | - |
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