Translation

1. strong (intense, powerful, unyielding)
2. strong (having a high concentration of some ingredient, e.g. alcohol)

   starker Tobak

   strong stuff

3. good, great, skilled especially
4. brilliant, awesome colloquial
5. incredible, unbelievable colloquial, dated

   ein starkes Stück

   an impressive feat

   Nun, es sind Eheleute, in Gottes Namen, soweit ist die Sache in Ordnung. Aber am hellen Morgen, das ist doch stark.

   Well, they are a married couple, in God's name, there's no issue in that regard. But in right in the bright of morning, unbelievable, really.

6. overweight, fat dated, euphemistic
7. strong (inflecting according to a pattern distinct from another called "weak")