Mtungi wa maji uko jikoni karibu na meko.

Wa is a connector often translated as of. So mtungi wa maji literally means jug/pot of water.

A very important point: wa agrees with mtungi, not with maji.
So:

• mtungi wa maji = water jug / jug of water
• mitungi ya maji = water jugs / jugs of water

Notice that when mtungi becomes plural mitungi, wa changes to ya.

It can mean either, depending on context.

Swahili often uses this noun + wa/ya + noun pattern for a broad relationship, and English has to choose a more specific translation. So mtungi wa maji can mean:

• a jug of water
• a water jug
• a jug for water

Usually the situation tells you which one is meant.

Maji is a mass noun in Swahili. Even though English water is uncountable, Swahili treats maji as a noun in class 6, which often has ma- forms.

So grammatically it behaves a bit like a plural-class noun, even though it means a substance, not several separate items. For example:

• maji mengi = a lot of water

So yes, it looks plural from an English point of view, but in Swahili that is just how the word for water works.

Uko means is located / is there.

In this sentence, it matches mtungi, which is a singular noun in the m-/mi- noun class. The u- part agrees with mtungi, and -ko is a locative form used for location.

So:

• Mtungi wa maji uko jikoni. = The water jug is in the kitchen.

If the subject were plural, the agreement would change:

• Mitungi ya maji iko jikoni. = The water jugs are in the kitchen.

Because ni and uko do different jobs.

• ni is commonly used to say that something is something else:
  • Huyu ni mwalimu. = This is a teacher.
• uko is used to say where something is located:
  • Mtungi uko jikoni. = The jug is in the kitchen.

So in this sentence, uko is the natural choice because the sentence is about location.

Sometimes, yes.

These locative forms can have slightly different meanings in more careful grammar:

• -ko = at/there
• -mo = in/inside
• -po = present/existing at a place

So:

• uko jikoni is very natural for is in the kitchen
• umo jikoni can put more emphasis on being inside the kitchen

In everyday speech, speakers do not always keep these distinctions very strictly, but for a learner, uko jikoni is a very safe and natural form.

The ending -ni is a locative suffix. It often means in, at, or to, depending on the context.

So jikoni means in the kitchen or at the kitchen area.

Historically, jiko means stove or hearth, and jikoni originally meant something like at the cooking place. In modern Swahili, jikoni is the normal word for in the kitchen.

Karibu na means near, close to, or next to.

So:

• karibu na meko = near the stove/hearth

The na is part of the pattern here, so learners should usually remember it as a set expression: karibu na + noun.

Also note that karibu by itself has other common meanings too, such as welcome or come near, so karibu na is the clearest way to express near in this sentence.

Jiko usually means stove, hearth, or cooking place.
Meko is its plural form, but in real usage it can refer to the cooking area or burners as a set.

So karibu na meko can naturally mean near the stove/hearth area.

Depending on the speaker and the exact object, you may also hear karibu na jiko. The choice can vary a bit by dialect, style, and whether the speaker is thinking of a single stove or the cooking place more generally.

Swahili normally does not use articles like English a and the.

So mtungi wa maji could mean:

• a water jug
• the water jug

The context tells you which meaning is intended.

That is very normal in Swahili, so you should not expect every noun to have a separate word for a or the.

The most neutral word order here is:

Mtungi wa maji uko jikoni karibu na meko.

That is basically:

subject + location word + place + extra location detail

Swahili word order is somewhat flexible, and speakers can move parts around for emphasis, but this version is very natural and straightforward. For a learner, it is a good model to follow.