This is the 4367th most frequent Arabic word.
نفسك
"Yourself."
In this sentence, 'نفسك' is used reflexively to mean 'yourself', referring to the person spoken to.
هل ترى نفسك ناجحًا في المستقبل؟
Do you see yourself as successful in the future?
Here, 'نفسك' emphasizes introspection and honesty towards oneself, again reflecting the pronoun 'yourself'.
كن صادقًا مع نفسك دائمًا.
Always be honest with yourself.
In this usage, 'نفسك' emphasizes the beneficiary of the action being the person spoken to, adding a sense of self-directed benefit.