禍根

かこん

root of evil, source of evil

禍根を残す

かこんをのこす

to create a breeding ground for future problems, to turn a blind eye to future trouble, to allow for something to come back and bite one in the ass (in the future)

根絶

こんぜつ

eradication, extermination

命を絶つ

いのちをたつ

to end one's life; to commit suicide

跡を絶つ

あとをたつ

to wipe out, to put an end to

根絶やし

ねだやし

eradication, extermination

連絡を絶つ

れんらくをたつ

to lose contact with (someone), to stop communication with, to go missing, to disappear

消息を絶つ

しょうそくをたつ

to stop communicating; to never be heard from again; to disappear; to go missing

禍

まが わざわい

wickedness, evil, calamity, disaster

禍禍しい

まがまがしい

ominous, sinister, unlucky, ill-omened

疾病の根絶

しっぺーのこんぜつ

Disease Eradication

薬禍

やっか

harmful side effects of a medicine or drug

筆禍

ひっか

troubles brought on by what one has written

舌禍

ぜっか

slip of tongue

赤禍

せっか

the Red Peril

禍乱

calamity; disturbance; disorder; turmoil

黄禍

こうか

Yellow Peril

兵禍

へいか

ravages of war

禍福

かふく

fortune and misfortune, prosperity and adversity, good and evil, weal and woe