Home / Vocabulary / 界 界 Kanji meanings and readings 界 N4 world; boundary On readingカイ Kun reading Radical田 Related vocabulary ✦Illustration in preparation 世界 N4 せかい the world ✦Illustration in preparation 境界 N2 きょうかい boundary ✦Illustration in preparation 限界 N3 げんかい limit; bound