uncertainty
🇺🇸
/ʌnˈsɜːrtnti/
🇬🇧
/ʌnˈsɜːtnti/
not being sure about something
His uncertainty about the future made him anxious.
将来への不確実性が彼を不安にさせた。
something that cannot be known for sure
The uncertainty of the weather made planning difficult.
天気の不確実性が計画を困難にした。