Where does “self-cooker” come from?

self-cooker (English) comes from English cooker, from English Cook, from German kochen, from Middle High German kochen, from Old High German kohhōn, from Proto-Germanic kukōną, from Proto-Germanic kukaz, from Latin coquus.

Ancestry of “self-cooker”, step by step

self-cooker traces back through two separate lines of ancestry.

via English cooker

StepLanguageWordMeaning
1EnglishcookerA device for heating food, a stove; An appliance...
2EnglishCookA placename
3Germankochento cook, to prepare food; to boil; to be stirred...
4Middle High Germankochento cook
5Old High Germankohhōnto cook
6Proto-Germanickukōnąto cook
7Proto-Germanickukazcook
8LatincoquusA cook; person who makes food
9Latincoquōto cook; prepare food
10Latinquoquoablative masculine singular of quisquis; ablative...
11Proto-Italickʷekʷōto cook
12Proto-Indo-Europeanpékʷetito be cooking; to ripen
13Proto-Indo-Europeanpekʷ-to cook; to ripen
14Proto-Indo-Europeanh₃-ép-kʷ-

via English Self

StepLanguageWordMeaning
1EnglishSelfHimself, herself, itself, themself, themselves; that specific (person mentioned)
2Middle EnglishsalveAlternative form of sauf
3Old Englishsealfsalve
4Proto-West Germanicsalbusalve, ointment
5Proto-Germanicsalbōsalve, ointment
6Proto-Indo-Europeansolp-éh₂
7Proto-Indo-Europeanselp-fat, oil
Every word from Proto-Indo-European h₃-ép-kʷ-