Abarim Publications' online Biblical Hebrew Dictionary
ירע
The verb ירע (yara') means to quiver, and it occurs only in Isaiah 15:4, where Moab's soul is said to quiver within him. The derived feminine noun occurs much more often: יריעה (yeria), meaning curtain (as a thing that quivers), most often in the sense of tent-curtains (Exodus 26:1, Jeremiah 10:20, Isaiah 54:2). This noun occurs very often along with the regular Hebrew word for tent אהל (ohel; see the name Oholiab).