痛い
いたい · itai · JLPT N5 · i-adj
painful
🩹 Sounds like eat-tie: eat a tie and your stomach will hurt
itai is also what Japanese speakers shout where English speakers say ouch. The kanji 痛 carries the sickness radical 疒, the same frame found in 病 (illness), so the character itself is filed under ailments.
痛 — sickness radical 疒 + 甬 (yǒng, phonetic)
痛 is a semantic-phonetic compound. The 疒 radical depicts a person on a sickbed and signals illness or pain. The component 甬 supplies the sound, historically close to 'tòng'. Together they convey bodily ache, later extended to emotional pain and the adverbial sense 'thoroughly'.