root, principle cause (of a problem) / prime culprit, instigator, leader of a criminal gang

(parts of Kyūshū) in what way

現況: present state, present condition / 元凶: root cause; prime culprit

期限: deadline / 機嫌: mood, how one is feeling / 起源: origin / 紀元: era; AD

屈強, 究竟: sturdy, strong, brawny

究竟: after all, in the end

屈強, 究竟: being sturdy, strong, brawny / 究竟: being superb, excellent, ideal

to return / to go back / to come back

go against, run counter to / go back, return

return