Ukisaga pilipili manga vizuri, supu itanukia sana.

It breaks down like this:

• u- = you (singular)
• -ki- = if/when
• -saga = grind

So ukisaga means if/when you grind. Swahili often builds the conditional idea into the verb instead of using a separate word like if.

It can mean either if or when, depending on context.

In a sentence like this, English could naturally say:

• If you grind the black pepper well, the soup will smell great
• When you grind the black pepper well, the soup will smell great

The Swahili form -ki- often covers both ideas.

Grammatically, yes: u- is second person singular, so it literally means you when speaking to one person.

But it can also be used in a more general sense, like English you in If you heat butter, it melts. So it may mean you, someone, or one in a general statement.

If you were speaking to more than one person, you would say mkisaga.

Pilipili manga means black pepper.

A few useful notes:

• pilipili by itself often means pepper or chili pepper
• manga specifies black pepper in this expression
• It is a fixed phrase

So here it is not talking about chili peppers in general, but specifically the spice black pepper.

Vizuri means well, properly, or thoroughly.

Here it modifies ukisaga, so it tells you how the pepper is being ground:

• ukisaga ... vizuri = if/when you grind ... well

In context, it can imply grinding it finely or properly enough to bring out the flavor and aroma.

Itanukia breaks down as:

• i- = subject marker for supu
• -ta- = future tense
• -nukia = smell / give off an aroma / be fragrant

So itanukia means it will smell fragrant or it will give off a nice aroma.

The i- is there because supu takes that agreement pattern in Swahili.

In food contexts like this, kunukia usually suggests a pleasant smell or a nice aroma.

So supu itanukia sana is more naturally understood as:

• the soup will smell very good
• the soup will be very fragrant
• the soup will have a strong, pleasant aroma

That is why English often uses a positive translation here.

Swahili does not have articles like English a, an, and the.

So supu can mean:

• soup
• the soup
• a soup

The exact English choice depends on context. That is very normal in Swahili.

Sana means very or a lot, and in Swahili it usually comes after the word or idea it intensifies.

So:

• itanukia sana = it will smell very good / very strongly / very fragrantly

Putting sana at the end is the normal word order here.

The original order is very natural:

• Ukisaga pilipili manga vizuri, supu itanukia sana.

But Swahili can also put the main clause first:

• Supu itanukia sana ukisaga pilipili manga vizuri.

Both are possible. Starting with ukisaga... puts the condition first, which is often the clearest and most common way to say it. The comma in writing helps show that first part is the condition.