Is hijaab a farz?

This translation I presented exactly from The Noble Quran translated by Dr muhammad Taqi-ud-Din Al-Hilali and Dr Muhammad Muhsin Khan and Published by King Fahad complex for Quran printing Madinatul Munawwara. I didn't add anything from my side. Anyway I will ask some Arabic Speaking persons for Meaning of Juyubihinna. I will let you know InshaAllah.