理论
lǐlùn · HSK 3
theory
📐 理论 = 理 (logic/principle) + 论 (discuss/theory)
理 means reason or principle; 论 means to discuss or treatise. Together they form theory — the discussed principles behind something, as opposed to 实践 (practice).
理 — jade radical 玉/王 + village 里 (phonetic)
理 is a semantic-phonetic compound: the jade radical 王 (玉) on the left signals meaning, while 里 on the right gives the sound. It originally meant the natural veins or grain in a piece of jade, then extended to 'pattern,' 'order,' 'principle,' and finally the modern senses 'reason' and 'to manage.'