Form الصِّفَة through ياء النَّسَب

If you add the doubled ending يّ to a noun, you can get an "Arabic adjective".For example:

لَـبَـنٌ - لَـبَنِــيٌّ Milk - milky

خَشَبٌِ - خَشَبِــيٌّ Wood - wooden

مَكْتَبٌ خَشَبِــيٌّ Wooden table

This is how you can form colors, (more details in the previous article)

بُـرْتُـقَالٌ - بُـرْتُـقَالِــيٌّ Orange (fruit) - orange (color)

Examples

Examples with يا النسب in the abjective (الصِّفَة) role

البَيْتُ البُـرْتُـقَالِيُّ على هذا الشارعِ The orange house on this street

السَّيَارَةُ البُـرْتُـقَالِيَّةُ أَمَامَ بَـيْـتِـي The orange car in front of my house

Feminine with ياء النَّسَب

The feminine gender is formed standardly (by adding ة)

الذهَبِــيُّ الذهبِــيَّــةُ Gold

عندي الفِكْرَةُ الذَّهَبِــيَّــةُ I have a golden idea