Where does “आत्मरति” come from?

आत्मरति (Hindi) comes from Sanskrit रति, from Sanskrit रम्, from Sanskrit -अनीय, from Sanskrit -ईय, from Proto-Indo-Iranian *-iHyas.

Ancestry of “आत्मरति”, step by step

StepLanguageWordMeaning
1Sanskritरतिrest, repose; pleasure, enjoyment, delight in,...
2Sanskritरम्enjoy, delight; stay, rest
3Sanskrit-अनीयable
4Sanskrit-ईयrelated to
5Proto-Indo-Iranian*-iHyas—
Every word from Proto-Indo-Iranian *-iHyas →Every word from Sanskrit -अनीय →Every word from Sanskrit रम् →