Chinese · Pronunciation Guide
yen-SHRR, both syllables rising. A tight "eh" in the first, no vowel at all in the second.
yánshí
Climb, then climb again in succession, needing a downward reset between them. Native speakers execute that reset so fast it sounds continuous, but skipping it entirely leaves the second syllable level, and the word then sounds like one long high syllable rather than two ascents.
Listen: 岩石
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山上有一块大岩石。
Shān shàng yǒu yí kuài dà yánshí.
There's a big rock on the mountain.
Listen: 山上有一块大岩石。
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山上有一块大岩石。 has yǒu keeping its dip because 一 has converted to a rising yí before the falling kuài. Then dà plunges and the two rises of yánshí close the sentence. So the utterance ends by climbing twice in a row after a hard drop — a demanding transition.
The -ian spelling in yán opens out to "yahn" when it should be a tight "eh". The second syllable draws the usual "shee", with a vowel that does not exist and a flattened retroflex. And the double rise collapses into one plateau unless you drop the pitch audibly between the two syllables.