the.com/balayage

means A hair-coloring technique where lightener is hand-painted onto sections of hair to create soft, natural-looking highlights that graduate from dark roots to lighter ends.

from From French balayer, 'to sweep' — a nod to the sweeping, freehand brushstroke motion stylists use to paint color onto the hair rather than foiling it in uniform sections. The technique and name came out of French salons before spreading internationally as a lower-maintenance alternative to traditional highlighting.