I. ˌən-ˈste-dē transitive verb
Date: 1532
: to make unsteady
II. adjective
Date: 1551
: not steady: as
a. : not firm or solid : not fixed in position : unstable
b. : marked by change or fluctuation : changeable
c. : not uniform or even : irregular
an unsteady pulse
• un·stead·i·ly -ˈste-də-lē adverb
• un·stead·i·ness -ˈste-dē-nəs noun