incest between [relatives]
incest 通常为不可数名词，不加冠词；涉及双方时用 between 引出。
Incest between close relatives is forbidden in almost every society.
近亲之间的乱伦在几乎所有社会中都被禁止。
乱伦；近亲相奸
incests — plural of incest
乱伦；[医] 近亲通婚
sexual intercourse between relatives too closely related to marry, such as a parent and child
Sexual relations between close relatives, especially immediate family members and sometimes first cousins, usually considered taboo.
Romantic relationships between close relatives, also widely taboo.
The novel explores how incest destroys the bonds within a family.
这部小说探讨了乱伦如何破坏家庭内部的纽带。
用法提示：incest 在此句中作名词，指乱伦行为。
In many cultures, incest is considered a serious crime and a taboo.
在许多文化中，乱伦被视为严重的罪行和禁忌。
用法提示：incest 作名词，表示近亲之间的性关系。
The documentary interviewed survivors of incest to raise public awareness.
这部纪录片采访了乱伦的幸存者，以提高公众意识。
用法提示：incest 作名词，此处作 of 的宾语。
incest 通常为不可数名词，不加冠词；涉及双方时用 between 引出。
Incest between close relatives is forbidden in almost every society.
近亲之间的乱伦在几乎所有社会中都被禁止。
表达“犯乱伦罪”常用动词 commit，也可用 have 或 perform，但不如 commit 正式。
He was convicted of committing incest with his daughter.
他因与女儿乱伦而被定罪。
表示“乱伦的受害者/幸存者”时，可用 victim/survivor of incest 或复合词 incest victim/survivor。
The organization supports adult survivors of incest.
该组织为成年乱伦幸存者提供支持。
an act of incest 为可数短语，指具体的乱伦行为；泛指现象时仍用不可数的 incest。
The film deals with an act of incest and its consequences.
这部电影讲述了一起乱伦行为及其后果。
grammar · medium
易错句子They have an incest relationship.
正确表达They have an incestuous relationship.
incest 是名词，不能直接修饰 relationship；应改用形容词 incestuous（乱伦的）。
grammar · medium
易错句子He did incest with his sister.
正确表达He committed incest with his sister.
表示“乱伦/犯乱伦罪”时，incest 应搭配动词 commit，构成固定动宾搭配；do 没有这种用法。
incest 与 insect 拼写仅差一个字母，发音也相近；但 incest 指近亲间的性关系，insect 指昆虫。
incense 作名词时读 /ˈɪnsɛns/，指敬神时点的香；incest 读 /ˈɪnsɛst/，指乱伦。二者拼写相近但意义完全不同，且 incense 还可作动词表示“激怒”。
犯乱伦罪
He was convicted of committing incest with his daughter.
他因与女儿乱伦被判有罪。
乱伦禁忌
The incest taboo exists in almost every culture.
乱伦禁忌几乎存在于每一种文化中。
乱伦幸存者
The organization provides support for incest survivors.
该组织为乱伦幸存者提供支持。
兄弟姐妹间的乱伦
Incest between siblings is illegal in most countries.
兄弟姐妹间的乱伦在大多数国家都是非法的。
乱伦指控
The allegations of incest were never proven in court.
这些乱伦指控从未在法庭上得到证实。
in-（不）+ -cest-（源自拉丁 castus，意为“贞洁”）
in-（不）+ correct（正确的）
in-（不）+ complete（完整的）
乱伦涉及家庭成员之间的性关系，与家庭结构密切相关。
乱伦在多数社会中被视为严重的禁忌。
乱伦常伴随情感或权力上的虐待与伤害。
乱伦问题常涉及有效同意的缺失。
乱伦指与亲近亲属发生性行为。
企业裙带关系
The regulator accused the company of corporate incest for awarding contracts to firms owned by its own executives.
监管机构指责该公司存在企业裙带关系，因为其将合同授予了由本公司高管所有的企业。
学术近亲繁殖
To bring in fresh perspectives, the university now limits academic incest in its faculty hiring.
为了引进新的观点，该大学现在在教师招聘中限制学术近亲繁殖。
Dictionary facts from ECDICT, WIKTIONARY.