So, hey guys. Was wondering about this word. I do not know if this is the correct forum as I am knew . I learned of this word as a photographical term, but I understand it also has abstract connotations about endurance and being self-controlled. Can anyone shed some light on this? Is it a bit obscure? are there more meaningful words that mean the same thing, in terms of "self-mastery"? I am obsessed with this and would love any information you could provide. Thanks!

Drew