蓋
ガイ, カイ, コウ, ふた, けだ.し, おお.う, かさ, かこう
cover, lid, flap
JLPT0 G7 S13 F2388
盍
# (press down and) cover + 艸 grass/plant → roof thatched/covered with grass → *cover*; *lid*.
[Full Kanji Etymology List]