aḥot

The basic and overwhelmingly dominant sense of achot is the female counterpart of ach (brother): a woman who shares one or both parents with another person. The word covers both full sisters and half-sisters with no distinction in form. In Leviticus the incest laws repeatedly invoke this term to define prohibited relationships: one's sister (daughter of father or mother), one's father's sister, one's mother's sister (Lev 18:9, 12, 13).

The term extends naturally to broader female kinship. In Numbers 25:18 Cozbi is called "their sister," meaning a kinswoman of the Midianites. In Leviticus 18:18 the phrase "a woman alongside her sister" (אִשָּׁה אֶל אֲחֹתָהּ) designates a co-wife or rival, using the word for any woman paired in the same marital bond. This broader-kin range is consistent with ach (brother), whose own range extends from brother to kinsman.

Geneaological notices throughout the Hebrew Bible routinely name female members of clans and tribes with this word (1 Chr 2:16; 3:9; 7:15, 18, 30, 32 and many others), confirming its standard role as the feminine noun for a family's female line.

In the poetry of the Song of Songs, the male speaker addresses his beloved five times as "my sister, my bride" (אֲחֹתִי כַלָּה, Song 4:9, 10, 12; 5:1, 2). This is not a claim of biological kinship but the language of deep intimacy: "sister" conveys the kind of bond formed in a household, carrying warmth and equality alongside desire. Ancient Near Eastern love poetry also uses this address formula, confirming it as a recognized convention of affectionate speech.

The metaphor extends beyond romantic love. In Proverbs 7:4 the sage urges his student to treat Wisdom as his sister, to hold it with familial loyalty, not mere acquaintance. In Job 17:14 Job addresses the grave as "my sister," using the intimacy of kinship language to express how utterly desolation has become his companion. In Jeremiah 22:18 "alas, sister!" is part of a mourning cry, showing that the title could function as a general address of grief.

The prophetic tradition extends this further by speaking of nations or cities as sisters. Jeremiah portrays faithless Israel as the elder sister whose example of unfaithfulness Judah watched (Jer 3:7, 8, 10). Ezekiel 16 and 23 develop the metaphor at length: Jerusalem, Samaria, and Sodom are cast as three sisters sharing a mother (Ezek 16:45-61), and in Ezekiel 23 Oholah (Samaria) and Oholibah (Jerusalem) are sisters who both turn to foreign lovers. The sisterhood language here points to shared origin, shared character, and shared fate.

In descriptions of the tabernacle curtains and the cherubim wings, Hebrew uses the idiom אִשָּׁה אֶל אֲחוֹתָהּ, literally "each woman to her sister," to describe matching objects placed side by side or joined to each other. The curtain panels of the tabernacle are "joined, each to its counterpart" (Exod 26:3, 5, 6, 17). The wings of the living creatures in Ezekiel's vision are "touching, each to its counterpart" (Ezek 1:9, 23; 3:13).

This is a recognized Hebrew idiom for reciprocal pairing: one of a matched set stands in relation to its partner the way one sibling stands to another. The grammatical formula uses the feminine pronoun because אָחוֹת is feminine, and the objects described (curtains, boards, wings) grammatically trigger the feminine. No actual kinship is implied; the word simply supplies the idea of "the one that matches this one."