/ ʌnˈɜːθ; NAmE ʌnˈɜːrθ/ verb [ vn ]
1.
to find sth in the ground by digging
SYN dig up :
to unearth buried treasures
2.
to find or discover sth by chance or after searching for it
SYN dig up :
I unearthed my old diaries when we moved house.
The newspaper has unearthed some disturbing facts.