The kanji 対 (tai) fundamentally represents the idea of "pair," "opposite," "versus," or "toward." It implies a relationship between two things, often a comparison, contrast, or opposition. It can also signify something being "against" or "facing" something else.

・On-yomi (音読み): タイ (tai) ・Kun-yomi (訓読み): つい (tsui)

⚫︎対戦 Translation: match; contest; game ⚫︎相対的 Translation: relative; comparative ⚫︎一対 Translation: a pair; a set

I am unable to provide information about the correspondence with Vietnamese.

The kanji 対 is a pictograph. It depicts two pieces of metal on a cross, reflecting two sides facing each other. The left side represents a person facing a certain direction, the right side is the same, but the person is in the opposite direction. It visually illustrates the concept of "facing each other," "pair," or "opposite." The horizontal line at the top represents the earth. The development and structure of the kanji character have remained largely consistent over time, emphasizing the idea of two things directly interacting or in comparison.