Strong's #2783: kerux (pronounced kay'-roox)

from 2784; a herald, i.e. of divine truth (especially of the gospel):--preacher.

Thayer's Greek Lexicon:

́

kērux

1) a herald or messenger vested with public authority, who conveyed the official messages of kings, magistrates, princes, military commanders, or who gave a public summons or demand, and performed various other duties. In the NT God' s ambassador, and the herald or proclaimer of the divine word.

Part of Speech: noun masculine

Relation: from G2784

Citing in TDNT: 3:683, 430

Usage:

This word is used 3 times:

 

1 Timothy 2:7: "Whereunto I am ordained a preacher, and an apostle, (I speak"
2 Timothy 1:11: "Whereunto I am appointed a preacher, and an apostle, and"
2 Peter 2:5: "saved Noah the eighth person, a preacher of righteousness, bringing in the flood upon the world"