willful (adjective) willful: stubborn, obstinate
Sinonime: adamant, bullheaded, contumacious,
determined, dogged,
fractious, froward,
headstrong,
inflexible,
intractable,
intransigent, mulish,
obdurate,
persistent,
pertinacious,
perverse, pigheaded, refractory, resolved, self-willed, stiff-necked,
uncompromising,
unyieldingAntonime: flexible,
willing,
yielding