If you feel queasy or if you have a queasy stomach, you feel rather ill, as if you are going to be sick. He was very prone to seasickness and already felt queasy. + queasiness quea·si·ness The food did nothing to stifle her queasiness
(adjective.) 15th century. From Middle English coysy, possibly from Old Norse kveisa (“boil”) ( > Norwegian kveise/kvise), perhaps influenced by Anglo-Norman queisier, from Old French coisier (“to wound, hurt, make uneasy”).