The kanji 痘 primarily means "pockmark" or "smallpox." It refers to the skin eruptions and scars associated with diseases like smallpox and chickenpox.

・On-yomi (音読み): ・トウ (tou) ・Kun-yomi (訓読み): ・にきび (nikibi) (acne, pimple, but in some context can relate to pox) ・もがさ (mogasa) (pockmark, scar from smallpox/chickenpox)

⚫︎ 天然痘 (tennentou) Translation: Smallpox ⚫︎ 痘痕 (toukon) Translation: Pockmark (scar from smallpox) ⚫︎ 水痘 (suito) Translation: Chickenpox

The kanji 痘 is a 形声文字 (keisei moji), a phono-semantic compound. ⚫︎ The radical (部首, bushu) is 疒 (やまいだれ, yamaidare), which signifies "sickness" or "disease." ⚫︎ The phonetic component is 豆 (mame, "bean"). The original meaning may be related to the shape of the eruptions looking like small beans.