Nantoka/기우giu기우 (giu) is a Korean word meaning “unfounded worry”.Meanings1unfounded worryPart of speechnounHanja杞憂Related words우려worry우울depression우울증the blues구기자fruit of the Chinese matrimony vine내우외환troubles both at home and abroad우국patriotism우국충정patriotism우국지사patriot우환worry우려되다fear우려하다be concerned우려스럽다worrisomeStudy Korean with flashcards →