Meaning
Admitting lack of information.
Cultural Background
The 'Italian Shrug' is a vital part of saying 'Non lo so'. It involves raising the shoulders and turning the palms upward. In the South, a quick upward flick of the head (a reverse nod) can sometimes mean 'I don't know' or 'No'. Italians often prefer to say 'Non saprei' (I wouldn't know) to sound more humble and less definitive in their ignorance. The word 'Boh' has become a universal filler. It can mean 'I don't know', 'I don't care', or 'Who knows?'.
The 'Lo' is Key
Always include 'lo'. Saying just 'Non so' sounds incomplete in Italian, like saying 'I don't know...' and trailing off.
Avoid 'No lo so'
This is a common mistake for Spanish speakers. Remember the 'n' at the end of 'Non'.
Meaning
Admitting lack of information.
The 'Lo' is Key
Always include 'lo'. Saying just 'Non so' sounds incomplete in Italian, like saying 'I don't know...' and trailing off.
Avoid 'No lo so'
This is a common mistake for Spanish speakers. Remember the 'n' at the end of 'Non'.
Use 'Boh' for Style
If you want to sound like a local, use 'Boh' with a shrug. It's the ultimate Italian expression of uncertainty.
Body Language
Don't forget to shrug! Italian is a physical language, and the shrug completes the meaning.
Test Yourself
Complete the sentence with the correct form of 'Non lo so'.
Scusa, dove sono le chiavi? __ __ __.
'Non lo so' is the correct order: Negator + Pronoun + Verb.
Which of these is the most informal way to say 'I don't know'?
Quale di queste è la più informale?
'Boh' is a very common informal exclamation for 'I don't know'.
Fill in the missing line in the dialogue.
A: 'A che ora apre il museo?' B: '________, guardo su internet.'
'Sapere' is used for information like opening times.
Match the phrase to the situation.
Situation: A professor asks a very difficult question.
In a formal academic setting, 'Non saprei' is more appropriate than 'Boh'.
🎉 Score: /4
Visual Learning Aids
Practice Bank
4 exercisesScusa, dove sono le chiavi? __ __ __.
'Non lo so' is the correct order: Negator + Pronoun + Verb.
Quale di queste è la più informale?
'Boh' is a very common informal exclamation for 'I don't know'.
A: 'A che ora apre il museo?' B: '________, guardo su internet.'
'Sapere' is used for information like opening times.
Situation: A professor asks a very difficult question.
In a formal academic setting, 'Non saprei' is more appropriate than 'Boh'.
🎉 Score: /4
Frequently Asked Questions
10 questionsTechnically yes, but it sounds like you're about to say more (e.g., 'Non so cosa fare'). For a complete 'I don't know', 'Non lo so' is much more natural.
It can be if said to a superior or in a formal setting. With friends, it's perfectly fine and very common.
'Non lo so' is factual and direct. 'Non saprei' is softer, meaning 'I wouldn't know' or 'I'm not sure'.
'Lo' is a pronoun meaning 'it'. 'Il' is an article meaning 'the'. You need the pronoun here to represent the information you don't know.
Add 'ancora' at the end: 'Non lo so ancora'.
No, for people use 'Non lo/la conosco'. 'Non lo so' is only for facts and information.
It's 'Non lo so'. 'L'ho' is used in the past tense: 'Non l'ho saputo'.
A shrug of the shoulders and palms turned up is the standard accompaniment.
Yes, it is standard Italian and understood everywhere, though regional dialects have their own versions.
Add 'proprio': 'Non lo so proprio'.
Related Phrases
Non saprei
similarI wouldn't know
Boh
synonymI don't know / No idea
Non ne ho idea
builds onI have no idea
Chi lo sa?
similarWho knows?
Non lo conosco
contrastI don't know him/it (familiarity)
