Learn Farsi: بدلکاری در این فیلم نفس‌گیر بود. - The stunt work in this film was breathtaking.

It is a combination of badal (substitute or fake), kâr (work or doer), and the noun-forming suffix -i. A stunt double is a badalkâr (substitute worker), and the act or profession itself is badalkâri.

What is the literal meaning of the compound adjective nafas-gir?

It literally translates to "breath-catching" or "breath-taking." It combines nafas (breath) with gir, which is the present stem of the verb gereftan (to take or catch).

How would I apply this lesson's grammar to say "The stunt work might have been breathtaking"?

You would introduce the sentence with momken bud or ehtemâl dâsht (it was possible), and then change the main verb bud (was) to its subjunctive form bâshad (or bâshe in spoken Farsi). The result: momken bud badalkâri dar in film nafas-gir bâshe.

Could I use the ezâfe and say badalkâri-e in film instead of badalkâri dar in film?

Yes, absolutely! Saying badalkâri-e in film (the stunt work of this film) is very natural and often preferred in everyday conversation over using the preposition dar (in). Both are grammatically correct and communicate the same idea.