The only free and comprehensive online etymological dictionary of the Spanish language
razón f. (Noun) "reason;" "correctness"
12th cent. Vulgar Latin ratione. Unexpected voicing from [ts] in Vulgar Latin into [dz] in Old Spanish must have ocurred very anciently: by the 12th cent., the word is already written razón instead of the expected raçón. From Latin rationem, accusative of ratio 'id.,' from ratus "established," the passive participle of reri "to consider." See rata for further etymology.
Indo-European
Romance
<>Western Vulgar Latin Asturian razón, Portuguese razão, Galician razón, Catalan raó, French raison, Italian razione, Romanian rațiune, Sardinian rajone
re- Prefix indicating "again" or "back"
From Latin re(d)- 'id.' From Proto-Italic *wre- 'id.' From Proto-Indo-European *u̯re- 'id.'
Indo-European
Italic
Umbrian re- "again"
Albanian
Albanian rrë- "back"
Balto-Slavic
Russian rak "crayfish," Czech rak 'id.,' Polish rak 'id.,' Slovene ràk 'id.,' Lithuanian érkė "tick," Latvian ẽrce 'id.'
real (Adjective) "real"
16th cent. From Latin realis "actual," from res "thing" and -alis, an adjective-forming suffix indicating a relationship (see -al (2)).
Indo-European
Romance
Portuguese real, French réel, Italian reale, Romanian real
realidad f. (Noun) "reality"
16th cent. From Medieval Latin realitatem, accusative of realitas 'id.' From realis "real" (see real) and -tas, noun-forming suffix (see -dad).
Indo-European
Romance
Portuguese realidade, Catalan realitat, French réalité, Italian realtà, Romanian realitate
realmente (Adverb) "actually"
From real and -mente.
recibir (Verb) "to receive"
Very early 12th cent. From Latin recipere 'id.' From re- "again" (see re-) and capere "to take" (see caber).
recibo m. (Noun) "receipt;" "reception"
Very early 17th cent. From recibir.
recordar (Verb) "to remember"
12th cent. From Latin recordari 'id.,' from re- "back" and cor "heart" (see corazón).
Indo-European
Romance
Portuguese recordar, Catalan recordar, French recorder, Italian ricordare
recuerdo m. (Noun) "memory"
13th cent. From recordar.
red m. (Noun) "network"
11th cent. From Latin rete "net." From Proto-Italic *rēti- 'id.' Of obscure origin. Compare Ancient Hebrew rešet "net."
Indo-European
Romance
Asturian rede, Portuguese rede, Galician rede, French réseau, Italian rete, Romanian rețea, Sardinian reta
Afro-Asiatic
Semitic
Ugaritic rθt "net," Ancient Hebrew rešet 'id.'