忙しい
いそがしい · isogashii · JLPT N5 · i-adj
busy
📅 忙 = heart (忄) + lost (亡): so busy you lose heart
The kanji 忙 joins the heart radical 忄 with 亡, meaning lost or perished. Being busy is having no heart left to spare. Sound hook: isogashii starts like isogu (急ぐ, to hurry) — hurrying people are busy people.
忙 — heart radical 忄 + 亡 (lose/perish)
忙 is a semantic-phonetic compound. The heart radical 忄 gives the meaning, suggesting a state of mind, while 亡 (lose, perish) supplies the sound. The image is of a heart so overwhelmed it 'loses itself' — hence 'busy, hurried, flustered'.