Usisahau kufunga zipu ya mkoba wako kabla ya kutoka nyumbani.

Usisahau means don’t forget when speaking to one person.

It is built from the verb -sahau (to forget) with a negative command pattern:

• u- = you (singular)
• -si- = negative marker
• -sahau = forget

So usisahau literally means something like you should not forget.

If you were talking to more than one person, you would say msisahau.

Kufunga is the infinitive form of the verb -funga, meaning to close, fasten, shut, tie.

After usisahau (don’t forget), Swahili often uses an infinitive:

• Usisahau kufunga... = Don’t forget to close/zip...

This works much like English don’t forget to...

Examples:

• Usisahau kuja = Don’t forget to come
• Usisahau kupiga simu = Don’t forget to call

It is more general.

-funga can mean:

• close
• shut
• fasten
• tie

In this sentence, because the object is zipu (zipper/zip), kufunga zipu naturally means to zip up or to close the zipper.

So the meaning comes from the combination:

• funga = close/fasten
• zipu = zipper

Zipu means zip or zipper. It is a loanword, ultimately from English.

Loanwords are very common in Swahili, especially for modern objects. Even if a word looks familiar, it still follows Swahili grammar in the sentence.

Here:

• zipu ya mkoba wako = the zipper of your backpack

The word ya here means of, but in Swahili this connector agrees with the noun before it.

The noun before it is zipu, which belongs to the noun class that takes ya in this pattern.

So:

• zipu ya mkoba = the zipper of the backpack

This does not mean mkoba’s zipper in an English-style possessive form; Swahili normally uses this noun + associative connector + noun structure.

More examples:

• mlango wa nyumba = the door of the house
• kitabu cha mtoto = the child’s book
• zipu ya koti = the zipper of the coat

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

So:

• mkoba wako = your backpack
• literally: backpack your

In the full phrase:

• zipu ya mkoba wako = the zipper of your backpack

Compare:

• rafiki yangu = my friend
• nyumba yetu = our house
• kitabu chake = his/her book

Mkoba means bag, and depending on context it can mean:

• backpack
• school bag
• shoulder bag
• satchel

So in this sentence, mkoba wako is naturally understood as your backpack/bag. The exact English word depends on context.

Kabla ya means before.

It is a very common expression. After kabla ya, Swahili often uses a noun or an infinitive.

In this sentence:

• kabla ya kutoka nyumbani = before leaving home

Other examples:

• kabla ya chakula = before food / before the meal
• kabla ya kulala = before sleeping
• kabla ya kusoma = before studying

Because kutoka is the infinitive to leave / to go out / to come from, and after kabla ya, Swahili commonly uses the infinitive to express before doing something.

So:

• kabla ya kutoka nyumbani = before leaving home

This is similar to English before leaving home, where English also uses an -ing form instead of a full clause.

Good question. Kutoka has several related meanings depending on context, including:

• to leave
• to go out
• to come from

Here, with nyumbani and the whole phrase kabla ya kutoka nyumbani, it means:

• to leave home
• to go out of the house/home

So context tells you which meaning fits.

Nyumbani means home or at home.

The ending -ni is a very common locative ending in Swahili. It often gives the sense of in/at/to a place, depending on context.

So from nyumba (house/home), you get:

• nyumbani = at home / home

Other examples:

• shuleni = at school
• sokoni = at the market
• mfukoni = in the pocket

In this sentence, kutoka nyumbani means to leave home.

It is addressed to one person.

That is shown by usisahau.

If you were speaking to several people, you would say:

• Msisahau kufunga zipu ya mkoba wenu kabla ya kutoka nyumbani.

Changes:

• usisahau → msisahau = don’t forget (plural)
• wako → wenu = your (plural)

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

So a phrase like:

• zipu ya mkoba wako

can mean:

• the zipper of your backpack
• your backpack’s zipper

The context makes it definite enough, so no separate word for the is needed.

Yes. This sentence is already natural, but Swahili often allows small variations.

For example:

• Usisahau kufunga zipu ya mkoba wako kabla hujatoka nyumbani.

This also means Don’t forget to zip your backpack before you leave home.

The original version with kabla ya kutoka nyumbani is very standard and clear. The alternative with kabla hujatoka nyumbani sounds a little more like before you leave home as a full clause.

The structure is:

• Usisahau = don’t forget
• kufunga = to close/zip
• zipu ya mkoba wako = the zipper of your backpack
• kabla ya kutoka nyumbani = before leaving home

So the full pattern is:

Don’t forget + to do something + before doing something else

That makes the sentence very natural in Swahili:

• Usisahau kufunga zipu ya mkoba wako kabla ya kutoka nyumbani.

A rough pronunciation guide is:

oo-see-sa-HAU koo-FUN-ga ZEE-poo ya m-KO-ba WA-ko KA-bla ya koo-TO-ka nya-MBA-ni

A few helpful points:

• Swahili vowels are usually pure and consistent:
  • a as in father
  • e as in bed but tenser
  • i as in machine
  • o as in go but shorter
  • u as in rule
• Stress is usually on the second-to-last syllable:
  • usisaHAU
  • kuFUNga
  • mkoBA
  • nyaMBAni

So if you keep the vowels clear and stress the second-last syllable, you will sound much more natural.