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7,153 words — headwords with part of speech, pronunciation, and a plain-language definition.

siete mil: seven thousand
siete pecados capitales: seven deadly sins
siete pies de tierra: grave
sietecolores: any of a number of birds
sietemesino: born two months premature
sietemesino: a baby born two months premature
sietemil: a mountain 7000-7999 metres high
sietillo: a premature; an infant born prematurely, especially at seven months of pregnancy.
sievert: sievert
sifaca: sifaka
sifilazo: syphilis; the pox
sifilítico: syphilitic
sifonaje: siphoning
sifonal: siphonal
sifonar: to siphon
sifonear: to siphon
sifonáptero: siphonapteran
sifonóforo: siphonophore
sifrino: snobbish, snobby, snob (said of a person who ostentatiously belongs to, or pretends to belong to the upper social classes); empty, dud (a person who possesses fashion and material goods, but who has low spiritual and intellectual qualities); stuck-up, full of airs and graces
sifón: siphon; U-bend; soda (as a mixer)
sigatoka: Sigatoka (disease)
sigilar: to stamp; to hush; to silence (keep secret)
sigilo: sigil; stealth; secrecy
sigilografía: sigillography
sigilosamente: sneakily, secretively, discreetly
sigiloso: sneaking, stealthy; discreet; secretive
sigla: initial; acronym (of any type: phonetic acronym or initialism)
siglo: century; age (significant period of time); eon
siglo de oro: golden years
sigma: sigma; the Greek letter Σ, σ
sigmatrópico: sigmatropic
sigmodontino: sigmodont
sigmoidal: sigmoidal
sigmoide: sigmoid
sigmoideo: sigmoid
sigmático: sigmatic
signar: to sign
signario: script (writing system)
signatario: signatory
signatario: signatory
signatura: label (on a book or otherwise)
significación: signification; significance; sense; meaning
significado: significant; important; well-known
significado: significance; meaning
significancia: significance
significante: significant
significante: signifier
significantemente: significantly
significar: to signify; to mean; to stand out; to speak out, to assert (to voice one's opinion)
significativamente: significantly
significatividad: significance, importance
significativo: significant; meaningful
signo: sign, indication; clipping of signo zodiacal (“zodiac sign”)
signo de exclamación: exclamation mark (either “¡” put at beginning of the question, or “!” put at the end of question)
signo de interrogación: question mark (either “¿” put at beginning of the question, or “?” put at the end of question)
signo del zodíaco: zodiac sign
signo igual: equal sign
signo negativo: minus sign
signo positivo: plus sign
signo zodiacal: astrological sign