何(なん)たるwhat (e.g. 'what rudeness') (an expression of surprise, anger)

先生(せんせい)：「ここで生徒(せいと)と会(あ)うとは！何(なん)たる偶然(ぐうぜん)！」

Teacher: "To meet a student here! What a coincidence!" {what (e.g. 'what rudeness') (an expression of surprise, anger)}

学問(がくもん)の何(なん)たるかを知(し)るために大学(だいがく)に進学(しんがく)しました。

I advanced to university to understand what scholarship truly is. {what (e.g. 'what rudeness') (an expression of surprise, anger)}

コーチ：「三(さん)キロのランニングでバテるなんて…何(なん)たる醜態(しゅうたい)！」

Coach: "Getting exhausted after a three-kilometer run... what a disgrace!" {what (e.g. 'what rudeness') (an expression of surprise, anger)}

あの世(よ)で、殺(ころ)し屋(や)：「同業(どうぎょう)に命(いのち)を狙(ねら)われて死(し)ぬなんて。はぁ…何(なん)たるザマだ。」

In the afterlife, the killer said: "To be killed by a rival in the same profession... Ah, what a predicament." {what (e.g. 'what rudeness') (an expression of surprise, anger)}

独(ひと)り言(ごと)：「何(なん)たる失態(しったい)！ヘマをしたが最後(さいご)、出世(しゅっせ)できなくなるというのに…。」

Monologue: "What a blunder! Despite knowing that making a mistake could ruin my chances of promotion..." {what (e.g. 'what rudeness') (an expression of surprise, anger)}