Hi vs Yo

When to use each in English, with meaning, register, and examples.

Hi

Informal High-frequency chunk A1 exclamation

Yo

Informal Top 2,000 (common) A1

Most common: Hi

	Hi	Yo
Pronunciation	🇬🇧 /["/haɪ/"]/ 🇺🇸 /["/haɪ/"]/ Hear Hi	🇬🇧 //jəʊ// 🇺🇸 //joʊ// Hear Yo
Meaning	A casual way to greet someone.	A casual greeting or way to get someone's attention.
Example	Hi guys!	Yo, are you coming to the party tonight?
Register	Informal	Informal
How common	High-frequency chunk	Top 2,000 (common)
CEFR level	A1	A1
Part of speech	exclamation
Collocations	say hi, wave hi, hi there	say yo, shout yo, yo dude, yo man, yo what's up
Antonyms	bye, goodbye, farewell, see you	-
Common mistakes	Using 'hi' in overly formal contexts., Spelling it as 'hey' which is more informal., Confusing with 'hello' which is slightly more formal.	Using 'yo' in formal emails or speeches., Mispronouncing it as 'yoe'., Confusing it with other greetings like 'hello' or 'hey'.
Usage notes	Used among friends and in casual settings. Avoid in formal situations like interviews or professional meetings.	Typically used among friends or in casual settings. Not suitable for formal occasions or with people you don't know well.

Frequently asked questions: Hi vs Yo

What's the difference between Hi and Yo?

Hi: A casual way to greet someone. Yo: A casual greeting or way to get someone's attention.

Which is more common: Hi and Yo?

Hi is the most common in everyday English.

Are Hi and Yo the same CEFR level?

Hi: A1, Yo: A1 on the CEFR scale.

Can I use Hi and Yo interchangeably?

Not always. Hi and Yo are related and overlap in some contexts, but they differ in register, how common they are, and usage, so swapping one for another can change the meaning or tone. Check the differences above before substituting.