以外いがい means “other than” or “except for”. It is added directly to nouns and verbs in their dictionary form.

緊急きんきゅう場合ばあい以外いがいは、通常つうじょう診療しんだん時間じかんない診療しんりょうけてください。
Except in cases of emergency, please receive medical care within the usual consultation hours.
最初さいしょからやりなお以外いがい方法ほうほうがない。
There is no method other than starting from square one.
かれはまだ回復中かいふくちゅうなので、スープ以外いがいのものがべられない。
He’s still recovering so cannot eat anything other than soup.
関係者かんけいしゃ以外いがい立入たちいり禁止きんし
Authorized personnel only.
和田わだ以外いがい全員ぜんいん参加さんかした。
Everyone joined except Wada.
それ以外いがいなにかんがえられない。
I can’t think of anything other than that.
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