조차(jo-cha, jocha)
A particle used to emphasize an unexpected or extreme case, even the least expected thing
When to use
negative emphasis, expressing surprise, extreme example
The nuance
Used mainly in negative or surprising contexts to emphasize inclusion of even the smallest or most unexpected case.
마저(ma-jeo, majeo)
A particle used to indicate inclusion of the last or even unexpected additional items, expressing completeness
When to use
including last item, unexpected addition, comprehensive listing
The nuance
Can be used in both affirmative and negative sentences to include the last item or an unexpected addition.