Original Word: ἀστήρικτος, ον
Part of Speech: Adjective
Transliteration: astériktos
Phonetic Spelling: (as-tay'-rik-tos)
Short Definition: unsteady, unstable
Definition: (lit: unpropped), unsteady, unstable, unsettled.

793 astḗriktos (an adjective, derived from 1 /A "not" and 4741 /stērízō "confirm") – properly, not established (unstable), describing someone who (literally) does not have a staff to lean on – hence, a person who can not be relied on because they are not steady (do not remain fixed, i.e. unstable).

Word Origin
from alpha (as a neg. prefix) and stérizó
Definition
unstable, unsettled
NASB Translation
unstable (2).