Where does “heterosexism” come from?

Heterosexism derives from English heterosexual plus the suffix -ism, from Ancient Greek -ισμός, from Ancient Greek -μός, from Proto-Indo-European -mós, denoting a state or condition.

heterosexism (English): The assumption made when relating to others that...

Definitions

  1. The assumption made when relating to others that...

Ancestry of “heterosexism”, step by step

heterosexism traces back through two separate lines of ancestry.

via English heterosexual

StepLanguageWordMeaning
1EnglishheterosexualSexually attracted to members of the opposite...
2English-sexualForms a noun or adjective describing a state or...
3EnglishsexualArising from the fact of being male or female;...
4Latinsexuālissexual
5Latinsexusdivision; sex; gender
6Proto-Italicseksus
7Proto-Indo-Europeanséksus
8Proto-Indo-Europeansek-to cut, cut off, sever

via English ism

StepLanguageWordMeaning
1EnglishismAn ideology, system of thought, or practice that...
2English-ismUsed to form nouns of action or process or result...
3Latin-ismus-ism
4Ancient Greek-ισμόςForms abstract nouns
5Ancient Greek-μόςForms abstract nouns
6Proto-Indo-European-mósCreates action/result nouns from verb stems
Every word from Proto-Indo-European sek-Every word from Proto-Indo-European séksusEvery word from Proto-Italic seksus