Wu (物) usually denotes an existence in the universe that has a form or an image.

In general, the word has three different meanings. First, it refers to any concrete

existence, encompassing all natural and man-made objects, all organisms and

human beings. Second, it covers interpersonal matters and activities such as

taking care of one's parents, entering politics, or managing state affairs. In this

sense, wu means "matter." Third, the word sums up all existing physical and

social matters, generally called "everything."