不倶戴天 ふぐたいてん Meanings Noun cannot allow (oneself) to live (with someone) under the canopy of heaven; cannot allow (the sworn enemy) to live in this world; irreconcilable (enemy) Kanji 不 un-. Read as フ. 倶 both; together; alike 戴 humbly receive. Read as タイ. 天 heaven. Read as テン. Words containing 不倶戴天 不倶戴天の敵 (ふぐたいてんのてき) mortal enemy Word lists Yojijukugo (四字熟語) Jinuma: Japanese Dictionary · Word lists