Questions & Answers about صفحهی لمسی کاملاً ضدآب است، مگر نه؟
How does the tag question مگر نه work at the end of this sentence?
Literally, مگر means "unless" or "except," and نه means "no." Together, مگر نه translates roughly to "unless it's not?" or "isn't that so?". It is the standard, universal way to form a tag question in Farsi. Unlike English, which changes the tag based on the verb used in the main clause (isn't it, aren't they, doesn't she), Farsi simply uses مگر نه for almost everything.
How is the word ضدآب (waterproof) constructed?
It combines ضد (anti/against) and آب (water). The word ضد is very common in Farsi for creating "anti-" or "-proof" words, such as ضدگلوله (bulletproof). Even though it is written as a single block or with a half-space here, it is pronounced with an ezafe connecting the two parts: zedd-e āb.
Why does کاملاً end with those two little diagonal lines over the alef?
That symbol is called a tanvin. It is a grammatical feature borrowed from Arabic that is frequently used in Farsi to turn a noun or adjective into an adverb. Here, it turns the adjective کامل (complete) into the adverb کاملاً (completely). The tanvin is always pronounced as "-an", making the word "kāmelan".
Doesn't صفحه usually mean "page"?
Yes, in the context of books and paper, صفحه means "page." However, it is also the standard Farsi word for a flat surface, panel, or electronic "screen." Paired with the adjective لمسی (tactile or touch-related, derived from the noun meaning touch), it creates the noun phrase (touch screen). Notice the spoken ezafe connecting the noun to its adjective.