📖 Biblical Definition
A sister is a female born of the same parents, and by extension, a woman united to other believers in the family of God. The Hebrew achot is the feminine of ach (brother), used for blood sisters like Miriam (sister of Moses and Aaron), for kinswomen, and metaphorically — as in Song of Solomon where the bridegroom calls his bride "my sister, my spouse" (Song 4:9), expressing both intimacy and purity. In the New Testament, adelphē designates women in the Church as family: Paul commends Phoebe as "our sister" (Rom 16:1), and instructs Timothy to treat "the elder women as mothers; the younger as sisters, with all purity" (1 Tim 5:2). The sisterhood of believers is not a social club but a covenant bond — women who share the same spiritual womb, born again by the same Spirit, serving in their distinct and honored role within the household of faith.
📖 Key Scripture
• 1 Timothy 5:2 — "The elder women as mothers; the younger as sisters, with all purity."
• Romans 16:1 — "I commend unto you Phebe our sister, which is a servant of the church which is at Cenchrea."
• Song of Solomon 4:9 — "Thou hast ravished my heart, my sister, my spouse; thou hast ravished my heart with one of thine eyes."
• Matthew 12:50 — "For whosoever shall do the will of my Father which is in heaven, the same is my brother, and sister, and mother."
• Proverbs 7:4 — "Say unto wisdom, Thou art my sister; and call understanding thy kinswoman."
⚠️ Modern Corruption
Feminist theology has co-opted "sisterhood" as a rallying cry for ideological solidarity against patriarchy, replacin...
expand to see more
Feminist theology has co-opted "sisterhood" as a rallying cry for ideological solidarity against patriarchy, replacing the biblical meaning — women united under God's fatherhood — with women united against male authority.
The secular "sisterhood" movement defines itself by opposition to masculine headship, teaching women that liberation means autonomy from the family structure God ordained. This inverts the biblical picture entirely: the sister in Scripture finds her identity within the household — under her father's protection, alongside her brothers, and ultimately as a wife and mother building the next generation. Paul's instruction that younger women be treated "as sisters, with all purity" assumes a family structure with boundaries and roles; modern culture strips those boundaries and then wonders why the Church is plagued with sexual scandal. True Christian sisterhood is women discipling women (Titus 2:3–5), older teaching younger to love their husbands, love their children, and be keepers at home — not organizing against the created order.
🔗 Greek & Hebrew Roots
H269 — achot (אָחוֹת): sister; feminine of ach (brother); used for blood sisters, kinswomen, and figuratively for wis...
expand to see more
H269 — achot (אָחוֹת): sister; feminine of ach (brother); used for blood sisters, kinswomen, and figuratively for wisdom and the beloved.
G79 — adelphē (ἀδελφή): sister; feminine of adelphos; used for believing women in the Church — Martha, Mary, Phoebe, and others.
G5360 — philadelphia (φιλαδελφία): brotherly/sisterly love; the mutual affection binding all believers as siblings in Christ.
🌐 Proto-Language Roots
The word "sister" descends from PIE *swésōr, one of the best-attested kinship terms in comparative linguistics, with ...
expand to see more
The word "sister" descends from PIE *swésōr, one of the best-attested kinship terms in comparative linguistics, with cognates in virtually every Indo-European branch.
Proto-Indo-European *swésōr — sister
→ Proto-Germanic *swestēr
→ Old English sweostor → Middle English suster → "sister"
→ Old Norse systir → Swedish syster
→ Gothic swistar
→ Sanskrit svasṛ (स्वसृ) — sister
→ Latin soror — sister → French sœur
→ English "sorority," "sororal"
→ Old Church Slavonic sestra → Russian сестра (sestra)
→ Lithuanian sesuo — sister
Possible PIE etymology:
*swe- ("self, own") + *-sor (feminine agent)
= "one's own [woman]" — the woman of the family
Hebrew (Semitic):
אָחוֹת (achot, H269) — sister
Feminine of אָח (ach, "brother")
→ Plural: אֲחָיוֹת (achayot) — sisters
Greek:
ἀδελφή (adelphē, G79) — sister
Feminine of ἀδελφός (adelphos, "brother")
← ἀ- (same) + δελφύς (delphys, "womb")
= "from the same womb"
Usage
• "To call a woman 'sister' in Christ is to place her under the protection of purity — she is family, not prey."
• "Miriam was sister to Moses and a prophetess in her own right — her song at the Red Sea is one of the oldest hymns in Scripture."
• "In the Song of Solomon, 'my sister, my spouse' unites the language of family with the language of marriage — the bride is both companion and kin."