The kanji 泡 (泡) primarily means "bubble," "foam," or "froth." It represents something that is light, airy, and typically formed by the presence of gas in a liquid. This can refer to bubbles in water, foam on beer, or even the froth of a wave. The core meaning is related to a state of being bubbly, foamy, or effervescent.

・On-yomi (音読み): ホウ (hō) ・Kun-yomi (訓読み): あわ (awa)

⚫︎ 泡風呂 Translation: bubble bath ⚫︎ 石鹸泡 Translation: soap bubbles ⚫︎ 泡立つ Translation: to foam; to froth

The kanji 泡 (泡) is a phono-semantic compound (形声文字, keisei moji). The left side is 水 (水, mizu), which means "water" and acts as the semantic component, indicating that the kanji relates to something involving water. The right side is 包 (包, hō), which means "to wrap" or "to contain." The sound of 包 (hō) is also used for the sound of 泡 (hō). Together, the kanji implies that a bubble, something that the water encloses and wraps.