誇
コ, ほこ.る
boast, be proud, pride, triumphantly
JLPT1 G7 S13 F1272
As per
夸
# (U-shaped) + 言 words → bend the truth → *exaggerate* (compare 訏) → *boast* (compare 詡) → *be proud of*.
[Full Kanji Etymology List]