慌ただしい
あわただしい · awatadashii · JLPT N2 · i-adj
busy
⏰ 慌 = heart 忄 + wild 荒; kin to 慌てる awateru, to panic
慌ただしい shares its root with 慌てる (awateru, to be flustered). The kanji pairs the heart radical 忄 with 荒 (wild, rough), so a heart running wild. A 慌ただしい day leaves no time to catch your breath.
慌 — heart radical 忄 + 荒 huāng (wild)
A semantic-phonetic compound: the heart radical 忄 gives the meaning (an emotional state), while 荒 supplies the sound huāng and a hint of 'wild, barren.' Originally suggesting a heart in disarray like wasteland, it came to mean flustered, panicked, or in a hurry.