究竟 (in the end / exactly)

• Pinyin: jiūjìng
• Formation: 究竟 + Question Word :: Subj. + 究竟 + Verb + 不/没 + Verb
• Hanzi breakdown: 究 = 穴 (cave) + 九 (nine); 竟 = 立 (stand) + 日 (sun) + 儿 (legs)

Meaning

究竟 is an adverb used in questions to express urgency or emphasis, meaning 'exactly,' 'after all,' or 'in the end.' It strengthens the tone of a question, showing the speaker's eagerness or frustration to know the answer.

究竟 adds emphasis to questions, conveying that the speaker has been wondering about something and wants a definitive answer. It is stronger and more emphatic than 到底, though both are often interchangeable. 究竟 tends to appear in slightly more formal or literary contexts compared to 到底, which is more colloquial. The word can also be used in statements to mean 'after all' or 'in the final analysis.' Learners sometimes overuse 究竟 in casual conversation where 到底 would sound more natural. 究竟 implies deeper contemplation or sustained curiosity.

Examples

1. 你究竟想要什么？ What exactly do you want?
2. 他究竟去没去过日本？ Has he actually been to Japan or not?
3. 这件事究竟是怎么回事？ What on earth is going on with this matter?

Usage Guide

Context: spoken, written

Tone: emphatic

Do Say

• 我想知道他究竟在想什么。
• 这个问题究竟有没有答案？
• 你究竟打算怎么处理这件事？

Don't Say

• 我究竟很开心。(究竟 is used in questions or to express doubt, not in straightforward positive statements) → 我很开心。
• 他究竟吃饭了。(究竟 requires a question context — a plain declarative statement with 了 does not work) → 他究竟吃饭了没有？

Origin & History

究竟 originally meant 'to investigate thoroughly' in classical Chinese. 究 means 'to examine' and 竟 means 'to finish/complete.' Together they convey getting to the bottom of something, which evolved into the emphatic questioning adverb used today.

Cultural Context

Generation: All ages

Social background: Universal