لابد
لابد (lâbod) means surely or I suppose in Persian. Borrowed from Arabic, it signals a confident inference: لابد خسته بودی means you must have been tired.
Glossary
هوا
هوا (havâ) means weather, air, and sky in Persian. Borrowed from Arabic, it appears in هوا سرده (the weather is cold) and هوا خوردن (to get some fresh air).
جیغ
جیغ (jigh) means scream or shriek in Persian and is a native onomatopoeic word. جیغ زدن means to scream and جیغ کشیدن means to let out a shriek, with both compound verbs in common everyday use.
خراب
خراب (kharâb) means broken, ruined, or out of order. Borrowed from Arabic, it forms خراب شدن (to break down) and خراب کردن (to ruin), two of the most-used compound verbs in everyday Persian.
احتیاج
احتیاج (ehtiyâj) means need or necessity, borrowed from Arabic. احتیاج داشتن means to need, and احتیاجی نیست (there is no need) is a staple of Persian polite refusals.
بدون
بدون (bedun) means without in Persian. It is borrowed from Arabic and functions as a preposition, used both before nouns and before the subordinating phrase بدون اینکه (without doing something).
مرگ
مرگ (marg) means death in Persian, inherited from ancient Iranian roots. It appears in everyday speech, classical poetry, and the political slogan formula مرگ بر (death to).
اتفاقاً
اتفاقاً (etefâghan) means actually or by coincidence. Borrowed from Arabic, it softens statements or signals mild surprise, as in بله اتفاقاً (yes, actually).
مطمئن
مطمئن (motma’en) means sure, certain, or confident. Borrowed from Arabic, it combines with Persian verb stems: مطمئن بودن (to be sure) and مطمئن شدن (to make sure).
نفس
نفس (nafas) means breath or soul in Persian, borrowed from Arabic. نفس کشیدن means to breathe, and the word also carries a deeper sense of life-force in literary and everyday use.