cardar

To card wool or fiber — combing it out to align the fibers before spinning — and, just as commonly today, to backcomb or tease hair for volume: cardarse el pelo (to backcomb one's hair), a staple term in hairdressing.

• La abuela cardaba la lana antes de tejer. — Grandma carded the wool before weaving.
• Se cardó el pelo para el peinado de los ochenta. — She backcombed her hair for the eighties hairstyle.
• El peluquero cardó las raíces para dar volumen. — The hairdresser teased the roots to add volume.

Learners who know only the textile sense may miss the everyday hairdressing meaning — cardarse el pelo is the far more common context most speakers will encounter.