Please, thank you, sorry — the words that keep you polite.

• ngicelaplease (lit. 'I request') — normal polite request
• ngiyabongathank you (I thank you)
• siyabongathank you (we thank you / from a group)
• kulungileyou're welcome / it's fine / okay
• uxolosorry / excuse me
• ngiyaxolisaI apologise / I'm sorry
• yeboyes
• chano
• mhlawumbemaybe / perhaps
• impelaof course / indeed / really
• kakhuluvery much (e.g. ngiyabonga kakhulu = thank you very much)
• ngiyacelaI am requesting (long present form of ngicela; used standing alone or for emphasis)