[adj] unpredictably excitable (especially of horses)
[adj] excited in anticipation
[adj] easily agitated; "quick nervous movements"
[adj] 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"
[adj] of or relating to the nervous system; "nervous disease"; "neural disorder"
aflutter, anxious, excitable, excited, neural, skittish, spooky, tense, troubled, uneasy, unquiet