納得
なっとく · nattoku · JLPT N3 · noun
understanding
📥 納得 = take in + gain: you accept it once it fully goes in
納 means to put in or store (as in 収納, storage), and 得 means to obtain or gain. To 納得 something is to take an idea in and actually get it, so you understand it and agree with it. Common phrase: 納得できない, I can't accept that.
得 — 彳 (step) + 旦 (sun/day) + 寸 (hand)
Originally depicted a hand 寸 reaching for a cowrie shell 貝 (later simplified to 旦), with 彳 'step' added to show going out and obtaining something. The core meaning is 'to get' or 'obtain'. The reading děi extends this to 'must/have to' — what one is obliged to get done.