Adjective
1. easily agitated;
"quick nervous movements"2. 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"3. of or relating to the nervous system;
"nervous disease""neural disorder"4. excited in anticipation
5. unpredictably excitable (especially of horses)