The kanji 能能 primarily conveys the meaning of "ability," "talent," or "capacity." It represents the inherent potential or skill one possesses to perform a certain action or achieve a particular outcome. It can also refer to capability, efficiency, or competence. It often implies a demonstration of skill or expertise, whether in a specific field or in general.

・On-yomi (音読み): ノウ (nou) ・Kun-yomi (訓読み): よ（く） (yoku) - this reading is less common and often used in the context of "well" or "can."

⚫︎ 能力 (nouryoku) Translation: ability; capacity; competence ⚫︎ 才能 (sainou) Translation: talent; ability; aptitude ⚫︎ 能楽 (nōgaku) Translation: Noh play (a classical Japanese musical drama)

This section is omitted because there is no information about the correspondence with Vietnamese.

The kanji 能能 is a phono-semantic compound (形声文字, keisei moji). The left part is the radical of "meat" or "moon" (月) and the right part is the character "匕" which represents a person. It is believed that it originally depicted a person (匕) who is able or has the capacity to do something related to the body (月). Over time, the meaning shifted to represent ability, skill, and capacity.