undertunic (English) comes from English under, from Middle English under, from Old English under, from Proto-Germanic under, from Proto-Indo-European h₁entér, from Proto-Indo-European h₁en — in; in, inside.
undertunic (English): A tunic worn under other clothing
Definitions
A tunic worn under other clothing
Ancestry of “undertunic”, step by step
undertunic traces back through two separate lines of ancestry.