noun
stubborn person; strong-minded person
Tosa dialect word for a person who is obstinate, strong-willed, or unyielding. Often carries a nuance of rustic toughness or pride.
あの人はいごっそうだから、一度言い出したら聞かない。
That person is an igossō, so once they say something, they won't listen.
土佐のいごっそう気質が彼にはある。
He has the stubborn Tosa temperament.