yawning ['jɔ:nɪŋ]

以下由轻松背单词网站提供

附加级

n.打呵欠adj.张着大嘴的，打哈欠的v.打呵欠( yawn的现在分词 )；张开，裂开

Yawning is often contagious. 打哈欠常易于感染。来自《现代英汉综合大词典》
I felt so sleepy I couldn' t stop yawning. 我感到很困，止不住地打呵欠。来自辞典例句