かたじけない

i-adjective

grateful; indebted; much obliged

A somewhat old-fashioned, humble expression of deep gratitude, often used when someone has gone out of their way to help. Feels more formal and weighty than ありがたい. Commonly used in period dramas or formal letters.

• お心こころ遣づかい、かたじけなく存ぞんじます。

  I am deeply grateful for your kind consideration.

• かたじけないお言こと葉ばをいただき、恐きょう縮しゅくしております。

  I am humbled by your gracious words.