諦
テイ, タイ, あきら.める, つまびらか, まこと
abandon, give up
JLPT0 G7 S16 F2457
As per
帝
# (unify) + 言 words → inquire preliminary to making a unifying decision → *give up*; *resign oneself to*; *be reconciled to*.
[Full Kanji Etymology List]