The kanji 吐 primarily conveys the idea of "to spit," "to vomit," or "to exhale." It refers to the act of expelling something from the mouth, either saliva, food, or air. It can also imply a release or expression of something internal, like emotions.

・On-yomi (音読み): ト (to) ・Kun-yomi (訓読み): は（く） (ha(ku))

⚫︎吐く Translation: To vomit; to spit. ⚫︎吐血 (toketsu) Translation: Hemoptysis; vomiting blood. ⚫︎本音を吐く (honne o haku) Translation: To speak one's true feelings; to be honest.

The kanji 吐 is a phono-semantic compound (形声文字, けいせいもじ). The semantic component is 口 (くち, kuchi), meaning "mouth," indicating the action involves the mouth. The phonetic component is 土 (つち, tsuchi), meaning "earth" or "soil," which provides the sound and hints at the expulsion of something. The combination suggests something is coming out of the mouth, similar to bringing up earth or soil.