📖 Biblical Definition
A watchword is the password a sentry uses to distinguish friend from foe in the dark. Scripture has its own watchwords — short, weighty confessions by which the covenant people recognize one another and confess what their household believes. "Hear, O Israel: The LORD our God is one LORD" (Deuteronomy 6:4) — the Shema, the foundational Old Testament watchword. "Jesus is Lord" (1 Corinthians 12:3; Romans 10:9) — the foundational New Testament watchword, given by the Holy Spirit and uttered only by believers. "Maranatha" — "Our Lord, come!" (1 Corinthians 16:22). The early church recognized each other by such words. Modern Christian men should know their watchwords and use them deliberately.
📜 Webster 1828 Definition
A word given to sentinels, and to such as have occasion to visit the guards, by which a friend is known from an enemy; a rallying cry.
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WATCHWORD, n. The word given to sentinels and to such as have occasion to visit the guards, used as a sign by which a friend is known from an enemy in the dark; a rallying motto.
Israel's great watchword is the Shema (Deut 6:4); the early church's great confession was Kyrios Iēsous (Jesus is Lord, 1 Cor 12:3); the church's liturgical watchword is the Christ-confession that distinguishes saint from imposter.
📖 Key Scripture
Deuteronomy 6:4 — "Hear, O Israel: The LORD our God is one LORD."
1 Corinthians 12:3 — "No man can say that Jesus is the Lord, but by the Holy Ghost."
Romans 10:9 — "If thou shalt confess with thy mouth the Lord Jesus, and shalt believe in thine heart that God hath raised him from the dead, thou shalt be saved."
Judges 12:6 — "Then said they unto him, Say now Shibboleth: and he said Sibboleth: for he could not frame to pronounce it right."
⚠️ Modern Corruption
Modern Christianity often softens its watchwords for cultural ease; Scripture preserves them as the markers of who belongs in the household.
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Judges 12 records the most uncomfortable watchword scene in Scripture: at the fords of the Jordan, Ephraimites who could not pronounce Shibboleth were exposed and slain. The picture is severe but the principle is biblical: watchwords distinguish.
The church's watchwords in the New Covenant are doctrinal: Jesus is Lord, God raised Him from the dead, the Word was God and the Word was made flesh. They mark the boundary of the household. Soften them and the watch is broken.
🔗 Greek & Hebrew Roots
Hebrew shibboleth (literal: ear of grain) became the proper noun for ‘watchword’ in English usage.
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Hebrew shibboleth — literally an ear of grain; in Judges 12:6 the test-word that exposed Ephraimite accent.
Note: in modern English, shibboleth means a distinguishing custom or saying.
Usage
"Watchwords distinguish; soften them and the watch is broken."
"Hear, O Israel — the great Old Testament watchword."
"Jesus is Lord — the great New Testament watchword."