almagrar

An old rural verb meaning to mark or dye something with almagre (red ochre), traditionally used to brand livestock or mark timber — a word tied to traditional farming practices, not modern city life.

• El pastor almagraba las ovejas para reconocer su rebaño. — The shepherd marked the sheep with red ochre to identify his flock.
• Antiguamente se almagraban los troncos destinados a la venta. — In the old days, logs meant for sale were marked with red ochre.
• La técnica de almagrar el ganado casi ha desaparecido hoy en día. — The technique of marking livestock with red ochre has almost disappeared today.

This verb is rare enough that the real risk is simply not recognizing it — it survives mostly in descriptions of traditional rural life, not in anything a learner is likely to say.