Wa lele po?
Wa lele po? is the Oshikwanyama morning greeting: literally, did you sleep well? The proper answer is Ee, onda lele po nawa, yes, I slept well, usually followed by asking the same in return.
Greetings are not small talk in Oshiwambo culture; they are the door to every conversation. Learn this one first and every elder you meet will forgive the rest of your grammar.
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Sources: Hai ti! A Beginner's Guide to Oshikwanyama (Peace Corps 2004, CC BY-SA). Draft pending partner review.