The word(s) "imposing" appears 3 time(s) in 3 verse(s) in Quran in Muhammad Pickthal translation.

(1) And when Our clear revelations are recited unto them, those who disbelieve say unto those who believe: Which of the two parties (yours or ours) is better in position, and more imposing as an army?

(سورة مريم, Maryam, Chapter #19, Verse #73)
(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) How many a generation have We destroyed before them, who were more imposing in respect of gear and outward seeming!

(سورة مريم, Maryam, Chapter #19, Verse #74)
(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)

(3) They say: Lo! ye used to come unto us, imposing, (swearing that ye spoke the truth).

(سورة الصافات, As-Saaffaat, Chapter #37, Verse #28)
(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)