无穷无尽 + 的 + Noun
无穷无尽 (wúqióng wújìn) means 'inexhaustible' or 'endless' and is an intensified form of 无穷. It uses two synonymous pairs — 无穷 and 无尽 — for emphasis, creating a four-character expression (成语) that conveys something truly without limit or end.
宇宙中的奥秘是无穷无尽的。
Yǔzhòu zhōng de àomì shì wúqióng wújìn de.
The mysteries of the universe are endless.
孩子们无穷无尽的问题让老师又累又开心。
Háizimen wúqióng wújìn de wèntí ràng lǎoshī yòu lèi yòu kāixīn.
The children's endless questions made the teacher both tired and happy.
大海给人一种无穷无尽的感觉。
Dàhǎi gěi rén yī zhǒng wúqióng wújìn de gǎnjué.
The ocean gives people a feeling of endlessness.