夏蟲不可以語冰 [－虫－－－语－]

Jyutping haa6 cung4 bat1 ho2 ji5 jyu5 bing1
Pinyin xià chóng bù kě yǐ yǔ bīng

Definitions (CC-CEDICT)
  1. a summer insect cannot discuss ice (idiom)