اِحْمَرَّ — يَحْمَرُّ — اِحْمِرَارًا
The root is ḥ-m-r. This example indicates becoming red, not causing another object to become red. The doubled final rāʾ is a characteristic of the pattern.
Word / formMeaning / explanation
اِحْمَرَّit turned red.
مُحْمَرٌّreddening or red-coloured.
Related examples include اِخْضَرَّturned green, and اِصْفَرَّ — turned yellow.
Many verbs of this pattern concern becoming a colour or entering a state.