unaccountably
🇺🇸
/ˌʌnəˈkaʊntəbli/
🇬🇧
/ˌʌnəˈkaʊntəbli/
adverb
R
in a way that is hard to understand or explain; for an unknown reason
She felt suddenly and unaccountably cheerful, even though she had just received bad news.
彼女は悪いニュースを受け取ったにもかかわらず、突然妙な理由で元気がついた。
translation
説明できないほどに