sirr
سِرّ
secret; the hidden reason behind something
لم تكشف الصحفية اسم مصدرها، فقد وعدته بحفظ السر.
The journalist never revealed her source’s name; she had promised to keep the secret.
يقول الخباز إن سر خبزه في ترك العجين يختمر ببطء.
The baker says the secret of his bread is letting the dough rise slowly.