desainar

A rare, specialized verb with two narrow senses: to remove the fat or greasy substance from something, and, in falconry, to deliberately weaken a molting hawk by reducing its food. It's essentially obsolete outside very specific traditional or historical contexts and unfamiliar to virtually all modern speakers.

• El término desainar apenas se usa fuera de la cetrería tradicional. — The term desainar is barely used outside traditional falconry.
• Antiguamente se desainaba la carne antes de conservarla. — In the past, meat was stripped of its fat before being preserved.
• Los cetreros desainaban al azor durante la muda. — Falconers would weaken the goshawk during its molt.

Not a verb any modern learner needs to worry about mistaking for anything else — it's obscure enough that recognizing it exists is more useful than expecting to encounter it in normal speech.