| PESS | a contraceptive device consisting of a flexible dome-shaped cup made of rubber or plastic |
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| PESS | of an organism's environment |
| PESS | a general disposition to look on the dark side and to expect the worst in all things |
| PESS | the feeling that things will turn out badly |
| PESS | a person who expects the worst |
| PESS | expecting the worst in this worst of all possible worlds |
| PESS | with pessimism |
| PESS | of an organism's environment |