altear

A regionalism with two distinct senses: in Ecuador, to raise the height of something like a wall (altear un muro); in Argentina and Paraguay, to shout a halt or warning at someone (altear a alguien). Not used in this literal sense in most other Spanish-speaking countries, where alzar or dar el alto would be used instead.

• Decidieron altear la tapia del jardín para más privacidad. — They decided to raise the height of the garden wall for more privacy.
• El centinela alteó al desconocido que se acercaba. — The sentry called out a halt to the stranger approaching.
• El terreno se altea hacia el fondo de la finca. — The land rises toward the back of the property.

Assuming altear is understood everywhere in the Spanish-speaking world — it's a regionalism specific to a handful of countries, so a learner using it in, say, Spain or Mexico is likely to just cause confusion.