得意
とくい · tokui · JLPT N3 · noun
triumph
🏆 得意 = gain + intention: you got what you meant to, so you feel proud
得 means to obtain and 意 means mind or intention. Getting what your mind was set on is a triumph. In everyday Japanese 得意 also means your strong point, the thing you are proud of being good at, as in 料理が得意 (good at cooking).
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.