惰だ性せい

noun

force of habit; momentum of habit

Describes continuing an action or state simply because one has been doing it, without conscious thought or fresh intention. Often used in expressions like 惰性で続ける.

• 毎まい日にち同おなじ道みちを通とおるのは、もはや惰だ性せいだ。

  Taking the same route every day is just force of habit by now.

• 惰だ性せいで仕し事ごとを続つづけているだけの状じょう態たいから抜ぬけ出だしたい。