Today’s word of the day is 理 (lǐ) which means reason. Let’s practice making different words, phrases, and sentences with 理 (lǐ).
理解 (lǐ jiě) To understand
The first word is 理解 (lǐ jiě) which means to understand. Let’s look at each character of this word, 理 means reason, and 解 means to solve. A way of using it in a sentence is 我完全理解你的困境，我会尽力帮助你。(Wǒ wánquán lǐjiě nǐ de kùnjìng, wǒ huì jìnlì bāngzhù nǐ.) I completely understand your predicament, and I will do my best to help you.
理论 (lǐ lùn) Theory
Another word we can create with 理 (lǐ) is 理论 (lǐ lùn). This is a noun that means theory. Let’s again look at each character of this word, 理 means reason, and 论 means argument. A way of using it in a sentence is 是一种重要的科学理论，它对我们的研究有很大的影响。(Zhè shì yī zhǒng zhòngyào de kēxué lǐlùn, tā duì wǒmen de yánjiū yǒu hěn dà de yǐngxiǎng.) This is an important scientific theory that has a significant impact on our research.
理智 (lǐ zhì) Rational
Finally, we can create the word 理智 (lǐ zhì) which means rational. The 智here means wisdom. A way of using it in a sentence is 在做决定时，我们应该保持冷静和理智。(Zài zuò juédìng shí, wǒmen yīnggāi bǎochí lěngjìng hé lǐzhì.) When making decisions, we should remain calm and rational.