至いたれ

いたれ · itare

JLPT N2 verb 命令形

至れ is the command form of 至る — to arrive at (e.g. a decision), to reach (a stage), to attain.

Classical Japanese — you’ll mostly meet it in older texts and set phrases

How it’s built

至る至れ

Command form (命令形). A blunt order: 書け! (Write!). Rude in normal conversation — you will see it in manga, signs, sports and set phrases.

至る is a classical japanese conjugation, so it follows that pattern.