sòlida

Sólida is the feminine singular form of the adjective sólido in Spanish and Portuguese. It is used to describe something that has solidity, either in a physical sense or in a figurative sense, indicating stability, reliability, or credibility. The term derives from the Latin solidus meaning firm or dense, and it has cognates across Romance languages.

In Spanish, sólido and sólida are used to describe tangible objects that maintain their shape and volume, such as una sustancia sólida, or to characterize ideas or constructions that are well-founded, such as una base sólida para un argumento or una evidencia sólida. It can also describe buildings or materials that are sturdy or durable.

In Portuguese, sólido and sólida serve similarly. Sólida describes a solid substance (uma substância sólida) and a solid basis or argument (uma base sólida para o argumento), as well as robust structures or plans (uma estrutura sólida). The related noun solidez expresses the quality of solidity or soundness.

Usage notes: solen steel and concrete are typically described as sólidos, while more abstract reliability or credibility is conveyed with a sólida base or sólida evidência. The word often appears in technical, scientific, and everyday language, and its antonym is líquido in the physical sense and frágil or instável in figurative contexts.

See also: sólido, solidez.