usage

אטבעה - I am sinking. Joining with the divine ט is revealed to man ב but the flesh ע doesn't understand.

יטבתה - pleasantness. A creation י where the joining ט is revealed to man ב. Tov ת makes it an object. Though it is pleasant, it is not understood ה.

מיטב - best of. Waters above מי (from מים with waters above and below) or the heavenly Torah joining ט revealed to man ב. This would be a divine revelation concerning the joining. It is surely the best.

טבעת - signet ring. The joining ט revealed to man ב in the flesh ע and made permanent ת. The signet ring is a sign to the flesh of a joining.

Many more where it is easy to see that טב implies good since it is teh joining with the divine. But it is also a 'bad' thing for the flesh which must die in the process. To acknowledge G-d as G-d, we must put to death the evil inclination.