1590s, "not firm or secure in position," from un- (1) "not" + steady (adj.). Similar formation in Old Frisian unstadich, German unstätig, Middle Dutch onstadich. Meaning "marked by irregularity" is from 1680s. Related: Unsteadily (1550s).
unsteady (v.)
"make unsteady," 1530s, from un- (2) "reverse, opposite of" + steady (v.). Related: Unsteadied; unsteadying.
her unsteady walk
an unsteady voice
his hand was unsteady as he poured the wine
climbing carefully up the unsteady ladder
unspoken
unsporting
unsportsmanlike
unstable
unstack
unsteady
unstick
unstinted
unstinting
unstop
unstoppable
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