Marejesho yako tayari.

Yes:

• marejesho = a noun
• yako = your, agreeing with the noun class of marejesho
• tayari = ready in this sentence

So the structure is basically:

noun + possessive + predicate

That is a very common Swahili pattern.

Because Swahili often leaves out the present-tense to be in short descriptive sentences.

So Marejesho yako tayari is understood as Your ... are ready, even though there is no separate word for are.

If you change the tense, a verb usually appears:

• Marejesho yako yalikuwa tayari = your ... were ready
• Marejesho yako yatakuwa tayari = your ... will be ready

Marejesho belongs to noun class 6, the ma-/ya- class.

That matters because other words connected to the noun must agree with that class. For example:

• possessive agreement: ya-
• subject agreement: ya-

That is why you get forms like yako with marejesho.

Because the possessive must agree with the noun being possessed, not with the English meaning of the sentence.

For marejesho:

• noun class = class 6
• possessive agreement for class 6 = ya-
• -ko = your for one person

So:

ya- + -ko = yako

Other forms would match different noun classes:

• wako goes with class 2 nouns such as watoto wako
• lako goes with class 5 nouns such as jina lako

Because in Swahili, possessives normally come after the noun.

So Swahili says:

• marejesho yako = your ...
• kitabu changu = my book
• rafiki wetu = our friend

This is different from English, where your comes before the noun.

Here it means ready.

That is a common learner question because tayari can also mean already in other sentences.

Compare:

• Marejesho yako tayari = your ... are ready
• Marejesho yako yamefika tayari = your ... have already arrived

So the meaning of tayari depends on how it fits into the sentence.

Because tayari is an invariable word. It does not take noun-class agreement.

Some Swahili adjectives do change form to match the noun class, for example:

• mtoto mkubwa
• watoto wakubwa

But tayari stays the same:

• chakula tayari
• marejesho tayari
• kitabu tayari

So you do not change tayari to match marejesho.

Grammatically, marejesho is in the ma- class, which often looks plural. But noun class and English number do not always match perfectly.

Depending on context, a class 6 noun can feel:

• clearly plural
• collective
• abstract
• mass-like

So the best way to think about it is:

• grammatically, it takes class 6 agreement
• in translation, singular or plural wording may depend on context

In some cases a related singular form may be rejesho, which would take class 5 agreement, such as rejesho lako. But actual usage depends on the meaning and context.

Usually, no. That sounds unnatural for this kind of sentence.

With tayari, Swahili normally just says:

Marejesho yako tayari

rather than inserting ni.

A good practical rule is:

• for this kind of present-time state, use the simple form with no separate are
• if you need another tense, use a verb such as yalikuwa or yatakuwa

Then your would change from yako to yenu.

So you would say:

Marejesho yenu tayari.

Here:

• -ko = your, singular
• -enu = your, plural

The agreement part still matches the noun class, so with class 6 you get yako or yenu.

A helpful pronunciation guide is:

• ma-re-JE-sho
• YA-ko
• ta-YA-ri

Swahili stress usually falls on the second-to-last syllable of each word.

So the strongest syllables are:

• mareJEsho
• YAko
• taYAri