unaccountably
🇺🇸
/ˌʌnəˈkaʊntəbli/
🇬🇧
/ˌʌnəˈkaʊntəbli/
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.
그녀는 나쁜 소식을 받았지만, 갑자기 이유 없이 기분이 좋아졌다.