unfathomable
🇺🇸
/ʌnˈfæðəməbl/
🇬🇧
/ʌnˈfæðəməbl/
impossible to understand or measure
The mysteries of the universe are unfathomable to the human mind.
宇宙的奧秘對人類心智來說是難以理解的。
impossible to understand someone's thoughts or feelings
His unfathomable expression made it impossible to tell if he was happy or upset.
他深不可測的表情讓人無法判斷他是高興還是沮喪。