unsteady C2+

/ʌnˈstɛdi/ liable to falter or shake; not firm or stable M S

stead C2+

/stɛd/ the place or role that someone or something would otherwise occupy M S

bestead C2+

/bɪˈstɛd/ to help or be of use to; also situated or circumstanced (archaic) M S

steadiness C2+

/ˈstɛdinəs/ the quality of being firm, stable, and constant M S