The only free and comprehensive online etymological dictionary of the Spanish language
serio (Adjective) "serious"
17th cent. borrowing from Latin serius 'id.' From Proto-Italic *sēr-jo- 'id.' From Proto-Indo-European *seh1-ro- "heavy."
Indo-European
Romance
Portuguese sério, French sérieux
Germanic
Gothic swers "honored," Old Norse svárr 'id.,' Old High German swār 'id.,' Old Saxon swār 'id.,' Old English swǣr 'id.'
Balto-Slavic
Lithuanian svarùs "heavy," Latvian svars "weight"
serpiente f. (Noun) "serpent"
13th cent. From Latin serpens 'id.,' from serpere "to creep," "to crawl." From Proto-Italic *serp-e/o- 'id.' From Proto-Indo-European *serp-e/o- 'id.'
Indo-European
Albanian
Albanian gjarpër "snake"
Hellenic
Ancient Greek ἕρπω (hérpo) "I crawl"
Indo-Iranian
Sanskrit sárpati "crawls"
servicio m. (Noun) "service"
10th cent. Borrowed from Latin servitium "slavery," from servus "slave" (see siervo).
Indo-European
Romance
Portuguese serviciu, French service, Italian servigio, servizio, Romanian serviciu
servir (Verb) "to serve"
10th cent. From Latin servire 'id.,' from servus "servant" (see siervo).
Indo-European
Romance
Asturian servir, Portuguese servir, Galician servir, Catalan servir, French servir, Italian servire, Romanian șerbi, servi, Sardinian selvire
sexo m. (Noun) "sex"
14th cent. borrowing from Latin sexus 'id.' Probably from Proto-Italic *seks- 'id.,' and that from Proto-Indo-European *sekh1-s- "to cut."
Indo-European
Romance
Portuguese sexo, French sexe, Italian sesso, Romanian sex
Balto-Slavic
Old Church Slavonic sěšti "to cut," Russian seč' 'id.,' Czech síci "to mow," Polish siec "to beat," Slovene sẹ́či "to cut"
sexual (Adjective) "sexual"
18th cent. From Latin sexualis 'id.,' from sexus "sex" (see sexo) and -ualis, an adjective-forming suffix (see -al).
sheriff (Noun) "sheriff"
Borrowed from English sheriff. Old English scirgerefa. Composed of scir "shire" and refa "reeve."
show m. (Noun) "show"
Borrowed from English show. Old English sceawian From Proto-Germanic *skawan- "to observe." From a root in Proto-Indo-European *skeu̯- 'id.'
Indo-European
Germanic
Old High German scouwōn "to observe," Old Saxon skawon 'id.,' Old English scēawian (English to show)
si (Conjugation) "if"
From Latin si 'id.' Old Latin sei. From Proto-Italic *sei "if," but originally "so." From Proto-Indo-European *so- "this."
Indo-European
Romance
Portuguese se, Galician se, Catalan si, French si, Italian se, Aromanian si, Romanian
Italic
Oscan svaí "if," Umbrian sve 'id.,' South Picene suai 'id.'
sí (1) (Adverb) "yes"
From Latin sic "thus." Old Latin sice. From Proto-Italic *sei-ke, from *sei "if," but originally "so" (see si for further etymology).
Indo-European
Romance
Asturian , Portuguese sim, assim, Galician si, Catalan , French si, Italian , Aromanian shi, Romanian și
Italic
Oscan svaí "if," Umbrian sve 'id.,' South Picene suai 'id.'