滅
メツ, ほろ.びる, ほろ.ぶ, ほろ.ぼす
destroy, ruin, overthrow, perish
JLPT1 G7 S13 F1222
烕 is 戌 (exterminate) + 火 fire → exterminate a fire. 滅 is 烕# + 水 water → exterminate/*destroy* by water → *annihilate*; *ruin*; *collapse*; *perish*; *die out*.
[Full Kanji Etymology List]