Chinese · Pronunciation Guide
chwahng-hu: a high level first syllable with the tongue curled back and a strong puff of air, then a weak toneless second.
chuānghu
Level then nothing, giving a strong-weak shape. Because hu is toneless it rides at whatever height the first syllable left, and since chuāng is level that means the whole word stays high — a different outcome from 桌子 or 椅子, where the neutral suffix lands low or at mid height.
Listen: 窗户
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很热,请开窗户。
Hěn rè, qǐng kāi chuānghu.
It's hot, please open the window.
Listen: 很热,请开窗户。
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很热,请开窗户。 opens with hěn keeping its full dip before the falling rè, then after the comma qǐng keeps its dip too because kāi is level. So both dipping tones survive unchanged. Then kāi and chuāng hold level and hu fades, ending the sentence high on a weightless syllable.
The first syllable accumulates errors: the retroflex flattens, the aspiration disappears, the rounded glide gets dropped, and the back nasal drifts forward. Take them one at a time. On the second syllable, learners restore a full falling tone by analogy with 户 as an independent character — here it is weightless and should barely register.