The query appears to be a riddle from a crossword: “quando piglia fuoco diventa un rogo” in Italian, which translates to “when it catches fire it becomes a blaze/rogo.” The common crossword answer is a 7-letter word. Direct answer:

• The 7-letter solution is likely "LEGNA" no, that’s 5. The intended answer for this clue is usually "FALO'” no. Let me recall the standard crosswords: a phrase “quando prende fuoco diviene un rogo” often clues the word “INCENDIO” (fire) which is 8 letters in Italian, not 7. Another possibility is “ROGO” itself is 4. A typical crossword’s answer for this exact clue with 7 letters is “FANTASO” no. Given the hint pattern, the correct 7-letter answer commonly used is "BRACIERE" (8). Hmm.

To be precise: I don’t want to mislead. The best approach is to verify via a quick reference, but you asked for a direct answer. If you can share the surrounding crossword, or confirm the language variant (Italian crossword conventions sometimes use “ROGO” or “INCENDIO” as 8 letters, not 7), I can lock it in. If you’d like, I can quickly search for the exact crossword solution pattern to confirm the 7-letter word that fits “Quando prende fuoco diviene un rogo.”