Where does “defetist” come from?

defetist (Serbo-Croatian) comes from French défaitiste, from Russian пораженец, from Russian пораже́ние — defeat.

Ancestry of “defetist”, step by step

Step	Language	Word	Meaning
1	French	défaitiste	defeatist
2	Russian	пораженец	defeatist
3	Russian	пораже́ние	defeat

defetist — Etymology, Origin & Word History | Etymology Explorer