To do something to an excessive degree.
何かを過度に行うこと。 (Nanika o kadoni okonau koto.)
"He went overboard decorating his office for the holidays."
"彼は休暇のためにオフィスの飾り付けでやりすぎた。" (Kare wa kyūka no tame ni ofisu no kazaritsuke de **yarisugita**.)
to be responsible for something difficult or unpleasant
A source of endless complications or trouble.
a conflict where both sides refuse to give up
you get the results of your actions, good or bad
to deal with your fears or bad memories courageously
to cause complete failure in a system or process
