Where does “heteropyknotic” come from?

heteropyknotic (English) comes from English hetero, from English heterosexual, from English -sexual, from English sexual, from Latin sexuālis, from Latin sexus, from Proto-Italic seksus, from Proto-Indo-European séksus — to cut, cut off, sever.

Ancestry of “heteropyknotic”, step by step

heteropyknotic traces back through two separate lines of ancestry.

via English hetero

StepLanguageWordMeaning
1EnglishheteroHeterosexual: of, pertaining to, or being a...
2EnglishheterosexualSexually attracted to members of the opposite...
3English-sexualForms a noun or adjective describing a state or...
4EnglishsexualArising from the fact of being male or female;...
5Latinsexuālissexual
6Latinsexusdivision; sex; gender
7Proto-Italicseksus
8Proto-Indo-Europeanséksus
9Proto-Indo-Europeansek-to cut, cut off, sever

via English pyknotic

StepLanguageWordMeaning
1Englishpyknoticshowing pyknosis
2EnglishpyknosisShrinkage and condensing, such as that of a dying...
3Ancient Greekπύκνωσιςthickening
4Ancient Greekπυκνόςthick; dense; sagacious, crafty, cunning
5Proto-Indo-Europeanpuḱ-tail; press together
Every word from Proto-Indo-European sek-Every word from Proto-Indo-European séksusEvery word from Proto-Italic seksus