ndiyo

particle

yes.

Ndiyo gives an affirmative answer. It also has a grammatical reading: that is it.

Also that is it.
A grammatical use identifying something.

Origins

The word’s earlier history is still under review.

Sources3

KIKO: Unit 2 Glossary
Yes; that is it.; Yes.
World Loanword Database CLDF
Ndiyo also has a grammatical reading: that is it.
University of Georgia, KIKO Grammar notes from Year 2, web page.
Ndio is used as a yes response.

Examples

Ndiyo, nina chenji.
Yes, I have change.
Ndiyo, naweza kulipa sasa.
Yes, I can pay now.
Ndiyo, nina tiketi.
Yes, I have a ticket.
Ndiyo, ninahitaji chupa.
Yes, I need a bottle.
Ndiyo, ninataka chai.
Yes, I want tea.
Ndiyo, bei ni shilingi mia.
Yes, the price is one hundred shillings.
Ndiyo, nina kalamu.
Yes, I have a pen.
Ndiyo, nina simu.
Yes, I have a phone.
Ndiyo, ninaweza kusubiri.
Yes, I can wait.