Strong's #3989: pelagos (pronounced pel'-ag-os)

of uncertain affinity; deep or open sea, i.e. the main:--depth, sea.

Thayer's Greek Lexicon:

́

pelagos

1) the sea

2) the high sea, the deep (where ships sail)

Part of Speech: noun neuter

Relation: of uncertain affinity

Usage:

This word is used 2 times:

 

Matthew 18:6: "neck, and that he were drowned in the depth of the sea."
Acts 27:5: "And when we had sailed over the sea of Cilicia and Pamphylia,"