the height of; utmost

の至り means the highest degree of a feeling, often in formal apology or gratitude. Attach it to a noun like 光栄 or 赤面. It is set, ceremonial language used in speeches and formal writing.

Examples

• このような賞しょうをいただき、光栄こうえいの至いたりです。

  Kono you na shou o itadaki, kouei no itari desu.

  To receive such an award is the greatest honor.

• 若気わかげの至いたりで、ひどいことをしてしまった。

  Wakage no itari de, hidoi koto o shite shimatta.

  In the folly of youth, I did terrible things.

Vocabulary in these examples

• この this (+ noun)
• いただく to receive (humble)
• ひどい terrible, awful
• する to do

Related patterns · Extremity and degree

• 〜の極み the height of; the extreme of
• 〜限りだ extremely; couldn't be more
• 〜極まりない extremely; utterly
• 〜に堪えない cannot bear to; not worth
• 〜に足る worth; enough to