lilac

The word 'lilac' traces a fascinating journey along ancient trade and cultural routes. It originates from the Persian word 'līlak' or 'nīlak', meaning 'bluish', which referred to the characteristic color of the flower. This term was adopted into Arabic as 'līlak' before passing into medieval Spanish ('lilac') and then French ('lilac'). English borrowed the word in the late 16th century, initially referring to the flowering shrub itself. Over time, the name of the plant became so strongly associated with its distinctive pale purple hue that it was adopted as a color term by the late 18th century, completing its semantic evolution from a descriptive color word in Persian to a plant name and back to a color descriptor in English.

The word 'lilac' is a simplex loanword. It entered English as a single, unanalyzable unit from French, which borrowed it from Spanish, which in turn borrowed it from Arabic, ultimately derived from Persian.