adjective/ˈsolido/
solid; strong, firm
Synonyms: fuerte, firme
Etymology tree Proto-Indo-European *solh₂-der. Proto-Indo-European *solh₂-i-dʰ-o-s Proto-Italic *soliðos Latin solidusbor. Spanish sólido Borrowed from Latin solidus (“solid”).
/ˈsolido/
solid; strong, firm
Synonyms: fuerte, firme
Etymology tree Proto-Indo-European *solh₂-der. Proto-Indo-European *solh₂-i-dʰ-o-s Proto-Italic *soliðos Latin solidusbor. Spanish sólido Borrowed from Latin solidus (“solid”).
solidus
Borrowed from Latin solidus (“gold coin”). Doublet of the inherited sueldo.
solid
Related: sólido arquimediano, sólido de Arquímedes, sólido platónico
From substantivation of the adjective in etymology 1.