anxious, nervous, queasy, uneasy, unquiet
(adjective) causing or fraught with or showing anxiety; “spent an anxious night waiting for the test results”; “cast anxious glances behind her”; “those nervous moments before takeoff”; “an unquiet mind”
nauseated, nauseous, queasy, sick, sickish
(adjective) feeling nausea; feeling about to vomit
nauseating, nauseous, noisome, queasy, loathsome, offensive, sickening, vile
(adjective) causing or able to cause nausea; “a nauseating smell”; “nauseous offal”; “a sickening stench”
Source: WordNet® 3.1
queasy (comparative queasier, superlative queasiest)
Experiencing or causing nausea or uneasiness, often characterized by an unsettled stomach.
Easily troubled; squeamish.
Quea"sy, a. Etym: [Icel. kweisa pain; cf. Norw. kveis sickness after
1. Sick at the stomach; affected with nausea; inclined to vomit;
2. Fastidious; squeamish; delicate; easily disturbed; unsettled;
ticklish. " A queasy question." Shak.
Some seek, when queasy conscience has its qualms. Cowper.
Source: Webster’s Unabridged Dictionary 1913 Edition