/fiː.ruːs/, /faj.ruːs/, /vaj.ruːs/
الأصلUltimately from Latin virus (“poison, slime, venom”), through English virus, per the pronunciation. Google Books analysis shows the word entered Arabic in the first half of the 19th century.
الصيغفَيْرُوس(canonical, masculine) · fayrūs(romanization) · فَيْرُوسَات(plural) · فَيْرُوس(indefinite, informal, singular, triptote) · الْفَيْرُوس(definite, informal, singular, triptote) · فَيْرُوس(construct, informal, singular, triptote) · فَيْرُوسٌ(indefinite, nominative, singular, triptote) · الْفَيْرُوسُ(definite, nominative, singular, triptote) · فَيْرُوسُ(construct, nominative, singular, triptote) · فَيْرُوسًا(accusative, indefinite, singular, triptote) · الْفَيْرُوسَ(accusative, definite, singular, triptote) · فَيْرُوسَ(accusative, construct, singular, triptote) · فَيْرُوسٍ(genitive, indefinite, singular, triptote) · الْفَيْرُوسِ(definite, genitive, singular, triptote) · فَيْرُوسِ(construct, genitive, singular, triptote) · فَيْرُوسَيْن(dual, indefinite, informal, singular, triptote) · الْفَيْرُوسَيْن(definite, dual, informal, singular, triptote) · فَيْرُوسَيْ(construct, dual, informal, singular, triptote) · فَيْرُوسَانِ(dual, indefinite, nominative, singular, triptote) · الْفَيْرُوسَانِ(definite, dual, nominative, singular, triptote)
المصدر: ويكاموس