decuplar

A rare, technical verb meaning to increase something tenfold — mathematically or figuratively (decuplar la producción, decuplar el riesgo). It's a formal, low-frequency word, more common in specialized or literary writing than everyday speech; decuplicar is the more frequently seen alternate form for the same idea.

• La empresa decupló su producción en una década. — The company increased its production tenfold in a decade.
• El riesgo se decupla si no se toman precauciones. — The risk increases tenfold if precautions aren't taken.
• Quieren decuplar las ventas del año pasado. — They want to multiply last year's sales by ten.

This is rare enough that most native speakers reach for multiplicar por diez instead of decuplar in casual speech — using it in ordinary conversation can sound stilted rather than wrong.

Often confused with decuplicar.