The only free and comprehensive online etymological dictionary of the Spanish language
actualizador (Adjective) "modernizing"
From actualizar and -dor.
actualizar (Verb) "to update," "to modernize"
From actuar.
actualmente (Adverb) "nowadays"
From actual and -mente.
actuante (Noun) "agent," "actor"
From the Old Spanish participle of actuar.
actuar (Verb) "to act;" "to activate"
16th cent. borrowing from Medieval Latin actuare 'id.,' a verb formed from Latin actus "act" (see auto (2) and acto).
actuaria (Adjective) "swift-sailing"
17th cent. From Latin actuaria "swift," from agere "to do" (see -igar).
acuerdo m. (Noun) "agreement"
13th cent. A noun derived from acordar.
Indo-European
Romance
Asturian acordes, Portuguese acordo, Catalan acord, French accord, Italian accordo
acústico f. (Adjective, Noun) "acoustic," "acoustics"
Early 18th cent. Borrowed from Ancient Greek ἀκουστικός (akoustikós) "auditory," from ἀκούειν (akoyein) "to hear," "to obey." From Proto-Indo-European *h2eu̯s- "to hear."
Indo-European
Germanic
Old Norse heyra "to hear," Old High German hōren 'id.,' Old Dutch hōron 'id.,' Old Saxon hōrian 'id.,' Old Frisian hōra, hēra 'id.,' Old English hēran 'id.' (English hear)
a(d)- Prefix "at," "towards"
From Latin ad-. From Proto-Italic *ad- 'id.,' a grammaticalized prefix from the preposition *ad (see a).
Indo-European
Romance
Asturian a-, Portuguese a-, Galician a-, Catalan a-, French a-, Italian a-, Romanian a-
Italic
South Picene ad-, Oscan ad-, ar-, Volscian ar-, Umbrian ař-, -ař
Celtic
Gaulish ad-, Old Irish ad-, Welsh ad-
Germanic
Old High German az-
Phrygian
Phrygian αδ- (ad)
adelante (Adverb, Interjection) "forward;" "enter!"
10th cent. From a(d)- and delante.