Breakdown of ندم الرجل على فعله.
الal
the
على'ala
on / of (evidence of) / to (lie to someone) / for (difficult for someone)
رجلrajul
man
هhu
his / him (object) / it (dummy pronoun after لأن)
ندمnadima
to regret
فعلfi'l
act, deed (an action)
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