The word(s) "fortified" appears 2 time(s) in 2 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) He said: That in which my Lord has established me is better, therefore you only help me with workers, I will make a fortified barrier between you and them;

(سورة الكهف, Al-Kahf, Chapter #18, Verse #95)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)

(2) They will not fight against you in a body save in fortified towns or from behind walls; their fighting between them is severe, you may think them as one body, and their hearts are disunited; that is because they are a people who have no sense.

(سورة الحشر, Al-Hashr, Chapter #59, Verse #14)
(Arabic, Transliteration, Urdu (Ahmed Ali), Urdu (Jalandhry), Farsi, Yusuf Ali, Shakir, Picthal, Mohsin Khan, French, Spanish, Indonesian, Malay, German, Bosnian, Russian, Dutch, Italian, Portuguese, Tafsir - Jalal ad-Din, Tafsir - King Fahad Quran Complex)