opuesto
Opuesto is a Spanish term that functions as both adjective and noun, meaning "opposite" or "opposed." It is used to indicate something that lies on the other side relative to another thing, or something that is contrary in nature, position, or stance. The word can describe physical space, as in el lado opuesto (the opposite side), or ideas and qualities, as in dos opiniones opuestas (two opposing opinions). When followed by a or en, as in opuesto a, it introduces a stance or comparison, for example estar opuesto a una propuesta (to be opposed to a proposal). As a noun, el opuesto or la opuesta can refer to the opposite person or thing, and is common in mathematical contexts as well.
Etymology and forms: opuesto derives from Latin oppositus, a participle of opponere, meaning to place against.
Mathematical usage: in mathematics, el opuesto de un número is its additive inverse, the number that, when
Overall, opuesto is a versatile term central to expressing negation, contrast, and spatial or logical opposition