Earthly Branches
Compared to Cantonese Chinese term "dyun eng" (which is duan wu in Mandarin Chinese) ngo/eng/wu all refer to the ancient Chinese calendar term: the seventh of the twelve Earthly Branches, which was a component for determining time based on a series of 60 years (just as today we refer to 100 year periods as centuries).) Ngo/eng/wu refers to the sun at noon.