程度・範囲・強調N1
〜の至りだ
the height of... / utmost... / most... (formal)
Structure
N + の至りだ
Explanation
N + の至りだ: the height of (gratitude, honor, etc.); used in letters and speeches.
Examples
このような賞をいただき、感激の至りです。
Receiving such an award fills me with the deepest gratitude.
皆様のお役に立てて、光栄の至りです。
It is a great honor to be of service to you all.
Note
Common: 感激の至り, 光栄の至り, 恐縮の至り. Used in letters and speeches.