The only free and comprehensive online etymological dictionary of the Spanish language
fumar (Verb) "to smoke"
Borrowed from Latin fumare 'id.,' a verb derived from the noun fumus "smoke" (see humo).
Indo-European
Romance
Asturian fumar, Portuguese fumar, Catalan fumar, French fumer, Italian fumare, Aromanian fumedz, Romanian fuma, Sardinian fumare
función f. (Noun) "function"
17th cent. From Latin functio 'id.' A noun formed from functus, the past participle of fungi "to perform." From Proto-Italic *fung-e/o- 'id.' From Proto-Indo-European *bhu̯-n-g- "to be used."
Indo-European
Romance
Portuguese função, Catalan funció, French fonction, Italian funzione, Romanian funcțiune
Celtic
Old Irish -bong "breaks," Middle Welsh diwung "to attack"
Germanic
Gothic biugan "to bow," Old Norse beygja "to bend," Old High German bougian 'id.,' Old Saxon bōgian 'id.,' Old English būgan "to bend" (English to bow)
Balto-Slavic
Russian bgat' "to bend," Lithuanian gùbti "hill," metathesis of *bùgti, Latvian baũgurs 'id.'
Armenian
Armenian bowcanem "to feed"
Indo-Iranian
Sanskrit bhuñjaté "to benefit," Old Avestan būj- "atonement"
"Lat. fungor must be linked with Skt. bhuṅkte, present middle, a nasal form (cf. bhuj-), the primary sense of which is “enjoy”; but at an early date it became specified in the sense of “enjoying food, consume.” This links up with the Armenian bucanem ‘to nourish, bring up’." ~ E. Benveniste, Indo-European Language and Society (1973)
funcionar (Verb) "to function"
19th cent. A verb formed from función.
fundamento m. (Noun) "foundation"
13th cent. From Latin fundamentum 'id.,' from the verb fundare "to found" (see fundar).
fundar (Verb) "to found"
14th cent. From Latin fundare "to found," derived from fundus "bottom" (see hondo.
Indo-European
Romance
Asturian fundir, Portuguese fundir, Galician fundir, Catalan fondre, French fondre, Italian fondere
fusión f. (Noun) "fusion"
19th cent. From Latin fusionem, accusative of fusio "melt," but originally meaning "outpouring." From the verb fundere "to pour" (see hundir).
Indo-European
Romance
Portuguese fusão, Catalan fusió, French fusion, Italian fusione, Romanian fuziune
futuro m. (Adjective, Noun) "future"
15th cent. From the Latin future participle futurus "about to be." From Proto-Indo-European *bhh2u̯-tó- "about to become." See more information under fui.
Indo-European
Romance
Portuguese futuro, Catalan futur, French futur, Italian futuro