From Vulgar Latin*eo (compare Romanianeu and Italianio); from Latinego, from Proto-Italic*egō, from Proto-Indo-European*éǵh₂.
io (first-person singular, pluralnoi)
From Old Italianeo, from Vulgar Latin*eo, from Latinego(“I”), from Proto-Italic*egō, from Proto-Indo-European*éǵh₂. Akin to Catalanjo and Spanishyo.
IPA(key): /ˈi.o/, [ˈiːo], (in fast speech)[ˈio̯]
io (personal, first person, possessivemio)
I, the first person
Italians avoid expressing personal pronouns both in written and spoken language, preferring to use just the inflected verb (an example would be: Am going for a walk, way more common than I am going for a walk; Is good-looking instead of She is good-looking). The explicit usage of personal pronouns may sound redundant to a native speaker, except when the purpose of the sentence is to specify the subject or the object (He is the one I was talking about).
The second-person pronoun in particular can sound confidential and, in some cases, even impolite.
Rōmaji transcription of いお
Echoic; compare Greek ἰώ(iṓ), or English yo.
(Classical) IPA(key): /ˈi.oː/, [ˈioː]
(Ecclesiastical) IPA(key): /ˈi.o/, [ˈiːɔ]
An exclamation of joy or pain, or for getting one's attention.
io in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
io in Charlton T. Lewis (1891) An Elementary Latin Dictionary, New York: Harper & Brothers
io in Gaffiot, Félix (1934) Dictionnaire illustré Latin-Français, Hachette
io in The Perseus Project (1999) Perseus Encyclopedia
io in Harry Thurston Peck, editor (1898) Harper's Dictionary of Classical Antiquities, New York: Harper & Brothers
io in William Smith, editor (1848) A Dictionary of Greek Biography and Mythology, London: John Murray
ijo, ieo, je, j', i'
From Vulgar Latin*eo, from Latinego. Compare Italianio.
I, the first-person singular nominative pronoun
always, every time, continuously
ever, at some point, sometime
“ie”, in Oudnederlands Woordenboek, 2012
Old High German
From Proto-West Germanic*aiw, whence also Old Englishā, Old Saxoneo, Old Norseei, Old Dutchēwa, io.