Tsaona (accident or incident) zvinoreva chiitiko chinoonekwa kana njodzi yasanangana nemunhu, muchina, zvivakwa kana nzvimbo dzakakomberedza. Sokuti mumhu akadhumiwa nebhazi inenge iri tsaona. Tsaona chinhu chisangadiwe chinoitika chisiri kutarisirwa. Njodzi yokuti munhu anokwanisa kurohwa nebhazi achifamba pamugwagwa iripo nguva dzose asi njodzi haisiri iyo tsaona. Vanoongorora zvenjodzi netsaona vanoti tsaona zhinji dzinokwanisa kudzivirirwa. VaTumbuka vanoti ngozi (accident) vachireva tsaona. VaGungu vanoti butandwa (accident) vachireva tsaona. MaZulu vanoti pewu (ideo. of capsizing, overturning) inyaudzosingwi inodudza kubheuka. MaZulu vanoti pewuka (v. Capsize, tum over, fall over) kureva kubhewuka. Mamwe mazwi: pewula (v.tr. Capsize, overturn; push over) kureva kubhewura.