The kanji 汽 primarily represents "steam," "vapor," or "fumes." It is closely related to anything that is produced by the heating of a liquid, transitioning it into a gaseous state. This kanji captures the essence of this transformation and the resulting cloud-like substance.

・On-yomi (音読み): キ (ki) ・Kun-yomi (訓読み): None, as the meaning is best conveyed through compound words.

⚫︎汽車 Translation: Steam train, train. ⚫︎汽船 Translation: Steamship, steamer. ⚫︎蒸気 Translation: Steam, vapor. The character 蒸 (jō) means "to steam" or "to evaporate," and together with 汽, it forms a word specifically for steam.

The kanji 汽 is a phono-semantic compound (形声文字, けいせいいもじ). The semantic component is 水 (水, mizu), meaning "water". The phonetic component is 气 (氣, ki), which originally depicted rising air or vapor. Therefore, 汽 combines the idea of water and air, representing steam or vapor.