Lexical Definition

‎πτόησις‎ ptóēsis (pto'-ay-sis) fear ^G:N-F
from ‎πτοέω‎

amazement.

• alarm

Abbott-Smith

πτόησις, -εως, ἡ (< πτοέω), [in LXX: Pr 3:25 (פַּחַד), Sir 50:4 א1, I Mac 3:25 R*;]
a fluttering, excitement, caused by any emotion, but esp. by fear, hence, terror: φοβεῖσθαι πτόησιν, to be afraid with (cogn. acc.) or of any terror (v. ICC, in l.): I Pe 3:6.†

Abbott-Smith References

Liddell-Scott-Jones

πτόησις-ησις,

or πτοίησις (so in [Refs 5th c.BC+], εως, ἡ, vehement emotion or excitement, [Refs 5th c.BC+]; ἡ τοῦ σώματος π. [πτόησιςησιν NT.1Pet.3.6. ">NT+4th c.BC+]

_{LSJ Scripture Refs: 1Pet.3.6}