an eurer

in your

→ an
phrase Uncommon #12,608
in your The meaning of “an” depends on the noun and the surrounding phrase; here, “eurer” is used with feminine nouns in the dative case.
GE: Ich habe an eurer Idee nichts auszusetzen.
EN: I have no objections to your idea.

An eurer Geschichte könnte etwas dran sein.

There might be something to your story.

Ich bin an eurer Seite, Plinio.

I am by your side, Plinio.

— Bacurau (2019)

Arbeitet an eurer Haltung, arbeitet an eurem Handwerk.

Work on your attitude, work on your craft.

— Never Look Away (2018)

Habt ihr an eurer Schule eine Bücherei?

Do you have a library at your school?

Tom hat Freude an eurer Gesellschaft.

Tom enjoys your company.

Ihr habt sechs Finger an eurer rechten Hand.

You have six fingers on your right hand.

— Die Braut des Prinzen (1987)

Seid an eurer Arbeit interessiert.

Be interested in your work.