老おいの一いっ徹てつ

noun

obstinacy of old age; stubbornness in old people

Refers to the inflexible, stubborn attitude often associated with elderly people. Used as a set phrase.

• 祖そ父ふは老おいの一いっ徹てつで、新あたらしいスマホを使つかおうとしない。

  My grandfather, with the obstinacy of old age, refuses to use a new smartphone.

• 老おいの一いっ徹てつというが、父ちちは自じ分ぶんの意い見けんを絶ぜっ対たいに曲まげない。

  They say old people are stubborn, and my father absolutely won't change his opinion.