that cannot be obtained; that cannot be found or created again
از دست رفته, گمشده, ناموجود, ناپیدا, از بین رفته
Piracy is costing film studios millions in lost revenues.
The strike cost them thousands of pounds in lost business.
lost sales/profits/earnings
She's trying to recapture her lost youth.
a poignant and bittersweet tale of lost love
He regretted the lostopportunity to apologize to her.
the lost art of letter-writing