Lexical Definition

‎ἀστήρικτος‎ astḗriktos (as-tay'-rik-tos) unstable ^G:A
from ‎Α‎ (as a negative particle) and a presumed derivative of ‎στηρίζω‎

unstable.

• unfixed, i.e. (figuratively) vacillating

Abbott-Smith

*† ἀ-στήρικτος, -ον (< στηρίζω),
unstable, unsettled: II Pe 2:14 3:16.†

Abbott-Smith References

Liddell-Scott-Jones

ἀστήρικτος, ον,

not supported by a staff, [Refs 1st c.AD+]; unstable, [NT+2nd c.AD+]; not remaining still, of persons, [Refs 4th c.AD+]; of water,[Refs]

_{LSJ Scripture Refs: 2Pet.3.16}