Ukifunika chakula hiki kwa kitambaa, harufu yake haitaenea chumbani.

Ukifunika breaks down as:

• u- = you (singular)
• -ki- = a marker meaning if/when
• funika = cover

So ukifunika means if you cover or sometimes when you cover, depending on context.

In this sentence, the conditional meaning if is the most natural.

In Swahili, demonstratives like this usually come after the noun:

• chakula hiki = this food
• kitambaa hiki = this cloth

This is the normal word order.
Also, hiki agrees with chakula in noun class. Chakula belongs to the ki-/vi- class in the singular, so the correct form is hiki.

Kwa often means with, by, using, by means of, depending on context.

Here, kwa kitambaa means with a cloth or using a cloth. It shows the means or instrument used to cover the food.

• kwa kitambaa = with a cloth
• kwa kisu = with a knife

So the phrase is functioning a lot like English with in cover it with a cloth.

It literally means its smell or the smell of it.

• harufu = smell / odor
• yake = its / his / her / their depending on context

In this sentence, yake refers to chakula hiki (this food), so harufu yake means its smell, that is, the food’s smell.

This is a very common Swahili question.

In Swahili, the possessive agrees with the thing possessed, not the owner.

Here, the thing possessed is harufu (smell), so the possessive must match harufu, not chakula.

• possessed noun: harufu
• possessive form that matches it: yake

So:

• harufu yake = its smell

Even though the smell belongs to the food, the agreement is controlled by harufu.

Haitaenea can be broken down like this:

• ha- = negative
• i- = subject marker for the noun class of harufu
• -ta- = future
• enea = spread / फैल? Wait, in English: spread out / disperse

So haitaenea means it will not spread.

Because the subject is harufu (smell), the verb agrees with that noun.

Chumbani means in the room.

It comes from:

• chumba = room
• -ni = a locative ending, often meaning in, at, to, on

So:

• chumba = room
• chumbani = in the room

This -ni ending is very common in Swahili for places:

• nyumbani = at home
• shuleni = at school
• mezani = on the table

It can mean both if and when, depending on context.

• if = conditional
• when = more time-related or habitual

So ukifunika chakula hiki kwa kitambaa... could, in another context, feel like when you cover this food with a cloth... But here the sentence is giving a condition and a result, so if is the best translation.

Grammatically, u- is you singular, but in Swahili it is also often used in a general sense, like English:

• If you heat water, it boils
• If you cover this food, its smell won’t spread in the room

So it may mean one actual person, or it may mean anyone / one / you in general.

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

Whether something is a cloth, the cloth, food, or the food is usually understood from context, or shown by words like demonstratives:

• chakula hiki = this food
• kitambaa = a cloth / the cloth / cloth, depending on context

So English needs articles, but Swahili usually does not.

The sentence follows a very common Swahili pattern:

conditional clause + main clause

• Ukifunika chakula hiki kwa kitambaa, = If you cover this food with a cloth,

• harufu yake haitaenea chumbani. = its smell will not spread in the room.

Inside the sentence, you can also notice some common Swahili patterns:

• verb before object: funika chakula
• noun before demonstrative: chakula hiki
• noun before possessive: harufu yake
• place expression often at the end: chumbani

So this is a very natural, standard Swahili sentence structure.