Otherwise – Sennò, Altrimenti: Italian Grammar Lesson

An interactive lesson guiding you from key takeaways to expert insights. Comes with Q&A, useful vocabulary, interactive audio, quizzes and games.

Prendi un ombrello, altrimenti ti bagnerai.
Prendi un ombrello, altrimenti ti bagnerai.
Prendi un ombrello, altrimenti ti bagnerai.
Published Sep 10, 2020
Updated Apr 27, 2026
Written by
Italian language tutor, course author. MEng, MBA. Member of the International Association of Hyperpolyglots (HYPIA). After learning 12 languages, I can tell you that we all master languages by listening and mimicking. I couldn’t find an app to recommend to my students, so I made my own one. With my method, you’ll be speaking Italian from Lesson 1.
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Key Takeaways

  • The word otherwise translates to altrimenti or se no/sennò in Italian, both meaning "if not" or "or else."
  • Altrimenti can also mean "in another way," while sennò is more common in spoken language.
  • Both se no and sennò can be used interchangeably in writing, reflecting their spoken usage.
  • Examples include: "Accetta il regalo, sennò mi offendo" meaning "Accept the present, otherwise I'll get offended."
  • Remember that altrimenti can imply a different method or approach, as in "Non so come dirlo altrimenti."

Stefano's Insights

Play to see captions...
Ah, il fascino delle sfumature linguistiche! 'Altrimenti' e 'se no/sennò' sono come quei cugini che si somigliano ma ognuno ha il suo carattere. 'Altrimenti' è il più versatile, usato anche per dire 'in un altro modo'. Mi ricordo quando ho scritto un messaggio a un amico: 'Vieni al cinema, altrimenti mi annoio da solo!' E lui ha risposto, 'Sennò, possiamo vedere un film a casa.' Ah, le scelte della vita! Sennò è più colloquiale, ma ormai è accettato anche nello scritto. Quindi, caro lettore, la prossima volta che ti trovi a scegliere tra questi termini, ricorda: puoi usarli entrambi per 'otherwise', ma solo 'altrimenti' per 'in un altro modo'.
Ah, the charm of linguistic nuances! 'Altrimenti' and 'se no/sennò' are like those cousins who look alike but each has their own character. 'Altrimenti' is the more versatile one, also used for 'in another way'. I remember texting a friend: 'Come to the cinema, otherwise I'll be bored alone!' And he replied, 'Sennò, we can watch a movie at home.' Ah, life's choices! Sennò is more colloquial, but now accepted in writing too. So, dear reader, next time you choose between these terms, remember: you can use both for 'otherwise', but only 'altrimenti' for 'in another way'.

Quick facts

How can you say "otherwise" in Italian?

You can say "otherwise" as "altrimenti" or "se no/sennò" in Italian.

Are "altrimenti" and "se no/sennò" interchangeable?

Yes, they are interchangeable when meaning "if not" or "or else."

Can "altrimenti" mean something other than "otherwise"?

Yes, "altrimenti" can also mean "in another way."

When should you not use "se no/sennò"?

You should not use "se no/sennò" when "altrimenti" means "in another way."

Which form is more commonly used today: "se no" or "sennò"?

"Se no" is slightly more widespread in current Italian usage.

Is "sennò" considered formal or informal?

"Sennò" is more informal and familiar compared to "se no."

How would you tell someone to write down a number to avoid forgetting it?

You would say, "Scrivi il numero, altrimenti te lo dimentichi."

What would you say to someone to avoid offending them by rejecting a gift?

You'd say, "Accetta il regalo, sennò mi offendo."

How can you express concern about someone coming back late?

You'd say, "Non fare tardi, altrimenti la mamma si preoccupa."

How do you explain not knowing how to say something differently?

You'd say, "Non so come dirlo altrimenti," meaning you don't know another way to say it.

Audio images

🔊
Sbrigati, altrimenti perderemo il treno.
🔊
Scrivi tutto, altrimenti dimenticherai dettagli importanti.
🔊
Prendi un ombrello, altrimenti ti bagnerai.
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Main Article

“Otherwise” in Italian

Both in Italian and in English, the word “otherwise” is used to introduce an alternative situation, condition, or consequence. In Italian, there are two main ways to translate it:

  • Altrimenti

Scrivi il numero, altrimenti te lo dimentichi.

Write the number down, otherwise you will forget it.

  • Se no / sennò

Scrivi il numero, se no te lo dimentichi.

Write the number down, otherwise you will forget it.

These two terms can be used interchangeably with the meaning of “if not“, “or else“, “otherwise“. However, only the term altrimenti can be used to mean “in another way“.

Non potevo fare altrimenti.

I could not do otherwise.

“Se no” vs “Sennò”

As I wrote before, there are two different ways we can write this expression: se no and sennò. They are both used in the same way, with the same meaning and are equally correct.

Sennò is basically how se no sounds when used in spoken language. However, they can now be used interchangeably in written contexts as well.

Let me now show you some more examples:

Accetta il regalo, sennò mi offendo.

Accept the present, otherwise I’ll get offended.

Spegni la televisione, se no la spengo io.

Turn off the TV, or else I will do it.

Usciamo a cena? Altrimenti potremmo ordinare un take away.

Shall we go out for dinner? Otherwise we could order takeaway.

Remember that altrimenti can also be used to mean “in another”, as in the examples below:

Non so come dirlo altrimenti.

I don’t know how to say it otherwise.

Key Terms and Concepts

Altrimenti

Used to indicate an alternative situation or a different outcome, often translated as "otherwise." It can also mean "in another way" in specific contexts.

Se no / Sennò

Interchangeable Italian expressions meaning "if not" or "otherwise," with sennò being a colloquial version of se no.

Sennò Usage

Sennò is often used in spoken language. It represents a contracted informal way of saying se no, though both are correct in writing.

Test your knowledge in 10 quick questions

Words

altrimentiotherwise
seif
nonot
sennòotherwise (informal)
accettareaccept
offendereoffend
regalopresent/gift
altruiothers'
inveceinstead
contestocontext

Phrases

altrimentiotherwise
se noif not
sennòor else (informal)
in caso contrarioin case of contrary
oppureor else
altrimenti dettootherwise known as
diversamentedifferently
in un altro modoin another way
se diversamenteif differently
nonostante ciòdespite that

Sentences

Devi finire i compiti, altrimenti non puoi uscire.

You must finish your homework, otherwise you can't go out.

Alzati presto, altrimenti perderai il treno.

Get up early, otherwise you'll miss the train.

Vuoi un po' di caffè? Altrimenti prenderò del tè.

Do you want some coffee? Otherwise, I'll have some tea.

Sbrigati, se no arriveremo tardi al cinema.

Hurry up, or else we'll be late for the movie.

Porta un ombrello, sennò ti bagnerai sotto la pioggia.

Bring an umbrella, otherwise you'll get wet in the rain.

Match the Phrases

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Answers

FAQs

How to say otherwise in Italian?

In Italian, there are two ways to express otherwise: Altrimenti and Se no/sennò.

What does Altrimenti mean?

Altrimenti has two main meanings: "otherwise" and “in another way”.

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