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Consanguinity is a formal, often legal word for being related by blood — sharing a family line through parents, , and so on. A parent and child, or two sisters, have consanguinity. A husband and wife do not, unless they were already blood relatives, which the law usually forbids. Lawyers and church records care about degrees of consanguinity: how close the blood tie is. Ordinary families just say “we’re related” or “she’s my cousin.” Though actually, people sometimes use “family” for everyone at the table, including in-laws; consanguinity is stricter and only counts blood. You will meet it in law, history, and biology more than in conversation.
血緣、血親關係（法律上和「姻親」相對）
組成From Latin com- “together” + sanguis “blood,” through French and Middle English. Literally togetherness of blood.
同家族的字
- consanguineousthe adjective: related by blood
- sanguinefrom the same Latin sanguis, “blood”; now usually means cheerfully hopeful, from old ideas about blood in the body
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
consanguinitynoun/kɒnsaŋˈɡwɪnɪti/
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A consanguineous or family relationship through parentage or descent.
- Near-synonyms: relatedness, relation (both contextually synonymous)
- 1776, United States Declaration of Independence They too have been deaf to the voice of justice and of consanguinity.
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Inbreeding.
- The Mongrel Virginians was similar to other eugenic family studies in its method and mode of argumentation, but its intensive focus on "race mixing," rather than consanguinity, represents a marked departure from the previous studies.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。