Let me try, though this is not easy:
vigorously - without energy, mildly, weakly, faintly, feebly
beautifully - horribly, terribly, badly
peacefully - wildly, violently, nervously, anxiously
reluctantly - decidedly, without hesitation, immediately
selfishly - generously, galantly, selflessly
constantly - inconstantly, imperpetually, discontinuously, on and off, sometimes