not qualified or suited for a purpose | having undesirable or negative qualities |
legally not qualified or sufficient | feeling or expressing regret or sorrow or a sense of loss over something done or undone |
not doing a good job | reproduced fraudulently |
not meeting requirements | characterized by wickedness or immorality |
showing lack of skill or aptitude | capable of harming |
| below average in quality or performance |
| serious or severe |
| not capable of being collected |
| not working properly |
| nonstandard |
| (of foodstuffs) not in an edible or usable condition |
| feeling physical discomfort or pain (`tough' is occasionally used colloquially for `bad') |
| physically unsound or diseased |
| not financially safe or secure |