"This is the only original recipe."

Translation: Questa è l'unica ricetta originale.

[mardelnorte]

I think the use of "solo" is more like saying "alone" and "unico" means "the only one"

[peter2108]

From Zanichelli Italian dictionary non si vive di solo pane (one does not live by bread alone). There is a phrase da solo a solo which means one to one: voglio vederti da solo a solo (I want to see you privately). You can say the same thing using the idiom a quattrocchi!

[Marninger]

This is = questa è
the only = l'unico (solo=alone/only/lonely)
original recipe = ricetta originale

[jObZi1]

Than you

[JazzGirl1]

Is it for Kentucky Fried Chicken? It's the only original recipe I want.

[Caltag]

Does la solamente mean the same as l'unica here?

[MintySciurus]

Solamente is closer to solo, than unico, but their meanings overlap. Solamente is an adverb (the ~mente part indicates an adverb formed from an adjective). So you'd use it to modify/describe a verb or an adjective, while unico/a is an adjective, which would modify a noun. (Note: unico can also be used as a noun.)

https://context.reverso.net/translation/italian-english/solamente
https://context.reverso.net/translation/italian-english/unica

https://en.m.wiktionary.org/wiki/solamente#Italian
https://en.m.wiktionary.org/wiki/solo#Italian
https://en.m.wiktionary.org/wiki/unico#Italian
https://en.m.wiktionary.org/wiki/unicamente#Italian
https://en.m.wiktionary.org/wiki/soltanto

[mvelcea]

Why is "la unica" wrong?

[Wyndham129]

l'unica vowel followed by a vowel uses the contration usually