This is the 413th most frequent Turkish word.
istifa
Resignation.
Here, 'istifa' is used as a noun meaning 'resignation' and is part of the verb phrase 'istifa etmek,' denoting the action of resigning.
Ali işinden istifa etti.
Ali resigned from his job.
'Istifa' is used as a noun referring to 'resignation,' emphasizing the act of resigning rather than the process.
Onun istifasını kabul etmediler.
They did not accept his resignation.
In this sentence, 'istifa' is used nominally to represent the act of resigning, and it conveys the concept of making such a decision.