一定 from HSK Level 2 Vocabulary List

The Chinese word 一定 (yīdìng) is composed of two characters: 一 (yī), meaning "one," and 定 (dìng), meaning "to determine" or "to fix." Together, these characters convey the idea of "definitely" or "certainly."The earliest known use of 一定 dates back to the Warring States period (475-221 BC), when it was used in the sense of "to make a decision" or "to come to a conclusion." Over time, the meaning of 一定 gradually shifted to its current sense of "definitely" or "certainly."一定 is a versatile word that can be used in a variety of contexts. It can be used to express certainty about a fact, to make a promise, or to give an order. For example:* 我一定會去。 (Wǒ yīdìng huì qù.) - I will definitely go.* 我一定會做到的。 (Wǒ yīdìng huì zuòdào de.) - I will definitely do it.* 你一定不能遲到。 (Nǐ yīdìng bùnéng chídào.) - You must not be late.一定 can also be used to express emphasis or urgency. For example:* 你一定要小心。 (Nǐ yīdìng yào xiǎoxīn.) - You must be careful.* 你一定要快點。 (Nǐ yīdìng yào kuàidiǎn.) - You must hurry up.一定 is a common word in Chinese, and it is important for HSK learners to understand its meaning and usage.