IPA: /ˈsɜːrkə/
KK: /ˈsɜr.kə/
Used to indicate that a date or amount is approximate or around a certain time.
The painting was created circa 1800.
Circa is derived from Latin 'circa' (meaning around or about). It is used to indicate an approximate date or time.
Think of 'around' in Latin to remember that 'circa' means approximately or about.