1. to think, to consider, to believe, to reckon
2. to think (of doing), to plan (to do)
3. to judge, to assess, to regard
4. to imagine, to suppose, to dream
5. to expect, to look forward to
6. to feel, to be (in a state of mind), to desire, to want
...
1. illness (usu. excluding minor ailments, e.g. common cold), disease, sickness
2. bad habit, bad behaviour, weakness, failing
3. crazy, insane, disturbed, sick in the head