Aggressively self-confident or assertive; bullheaded
Optimistic; overly or foolishly optimistic or hopeful
Characterized by rising value.
Having a muscular physique, built 'like a bull'
lacking physical strength or vigor; weak
incapable of sexual intercourse, often because of an inability to achieve or sustain an erection, having impotentia coeundi
lacking in power, as to act effectively; helpless
sterile
a man who has erectile dysfunction
an impotent or powerless person