Learn Hardcore Swahili: Watoto wakiteleza kwenye mteremko, wazazi watawasaidia kuinuka. - When the children slide on the slope, the parents will help them stand up.

Morphology:
• wa- = 3rd person plural subject prefix (they, i.e. the children)
• teleza = slip
So wakiteleza simply means they slip. In Swahili you express a general if/when condition by using the present-tense verb in the protasis (no separate word for “if” or “when”). Context turns wakiteleza into if/when they slip.

Why are there two wa- prefixes in watawasaidia, and what do they do?

Morphology:
• wa- (1) = 3rd person plural subject prefix (they, i.e. the parents)
• ta- = future-tense marker
• -wa- (2) = 3rd person plural object prefix (them, i.e. the children)
• saidia = help
So watawasaidia literally means they will help them.

Why does saidia require ku- before inuka, and what does kuinuka mean?

After verbs of assistance like saidia, the following action is given as an infinitive. In Swahili infinitives begin with ku-:
• inuka = get up
• kuinuka = to get up
Thus watawasaidia kuinuka = they will help (them) to get up.

Why is kwenye used before mteremko, and are there alternatives for saying on the slope?

kwenye is a locative preposition meaning on/at/in, usable with any noun class:
• kwenye mteremko = on the slope
Alternatives:

katika mteremko = in the slope (less common)
juu ya mteremko = on top of the slope
Locative suffix -ni: mteremkoni = at/on the slope (no kwenye needed)

Is it possible to omit the object marker -wa- in watawasaidia, and what difference does that make?

Yes. You can say wazazi watawasaidia kuinuka without the object marker. It still means parents will help to get up, with them understood from context. Including -wa- explicitly ties the help back to watoto, making the sentence clearer and more natural.

Is the comma between the clauses required, and how else could you join them?

The comma is optional but common to separate the protasis (conditional clause) from the apodosis (main clause). You could:
• Omit the comma entirely:
Watoto wakiteleza kwenye mteremko wazazi watawasaidia kuinuka
• Use a conjunction instead:
Watoto wakiteleza kwenye mteremko na wazazi watawasaidia kuinuka

What noun class is mteremko, and does kwenye agree with noun class?

mteremko is a class 3 noun (prefix m-, stem -teremko). Prepositions like kwenye do not change form for different noun classes—they remain the same regardless of which class the noun belongs to.