also: あったら
adverb
alas; regrettably; tragically
Literary or old-fashioned expression of regret, similar to 'alas' or 'what a pity'. Not used in everyday conversation.
あたら若い命を散らした。
Alas, he lost his young life.
あたら名作が戦火で失われた。
Regrettably, the masterpiece was lost in the war.
Rare single-character spelling; easily confused with other readings.
Derived from the adjective 可惜し (あたらし), an old form meaning 'precious' or 'regrettable to lose'. The adverbial form あたら came to be used as an interjection of regret.