Chumvi nyingi ni mbaya kwa afya yako.

A word-by-word breakdown is:

• chumvi = salt
• nyingi = much / a lot of / many, agreeing with chumvi
• ni = is / are
• mbaya = bad / harmful
• kwa = for
• afya = health
• yako = your

So the sentence is literally something like salt much is bad for health your.

In Swahili, adjectives usually come after the noun they describe.

So:

• chumvi nyingi = much salt / a lot of salt

This is different from English, where adjectives usually come before the noun.

Because Swahili adjectives must agree with the noun class of the noun they describe.

Chumvi belongs to the N-class (class 9/10), so the adjective stem -ingi becomes nyingi.

Compare:

• chumvi nyingi = a lot of salt
• maji mengi = a lot of water
• vitabu vingi = many books

The adjective changes form depending on the noun class.

It is best understood as a mass noun, like salt in English.

So chumvi nyingi does not mean there are many separate countable salts. It means a lot of salt or much salt.

Even though nyingi may look like a plural-type form to an English speaker, with mass nouns it often expresses quantity, not countable plural meaning.

Literally, chumvi nyingi is closer to much salt or a lot of salt.

In context, especially in a health warning, English often translates it as too much salt because that sounds natural. So the English meaning may be a little stronger than the most literal Swahili wording.

Ni is the copula, the word that works like is/are in English.

It links the subject and the description:

• Chumvi nyingi = too much salt / a lot of salt
• ni mbaya = is bad

So ni is the word that makes the sentence say that one thing is something.

Mbaya means bad or harmful, and kwa here means for.

So:

• mbaya kwa afya yako = bad for your health

This is a very natural Swahili pattern:

• nzuri kwa afya = good for health
• mbaya kwa afya = bad for health

In Swahili, possessives usually come after the noun.

So:

• afya yako = your health
• literally: health your

This is normal Swahili word order, not a special case.

Possessives also agree with noun class.

The noun afya is in the N-class, so the possessive form used with -ako is yako:

• afya yako = your health

You would use wako with different noun classes, for example:

• mtoto wako = your child

So the form depends on the noun, not on the person being addressed.

Swahili usually does not use articles like English a/an/the.

That means the language often leaves that idea to context. So chumvi nyingi can be understood naturally without any separate word for the or a.

Yes. Depending on context, mbaya can mean:

• bad
• harmful
• unhealthy
• serious or severe in some contexts

In this sentence, bad for your health or harmful to your health is the most natural meaning.

Yes. The structure stays the same:

• afya yangu = my health
• afya yako = your health
• afya yake = his/her health
• afya yetu = our health
• afya yenu = your (plural) health
• afya yao = their health

For example:

• Chumvi nyingi ni mbaya kwa afya yangu = Too much salt is bad for my health.