doorsill (English) comes from English door, from Middle English dore, from Old English dora, from Proto-Germanic durô, from Proto-Indo-European dʰer- — to support; to hold.
doorsill (English): The horizontal piece of material at the threshold...
Definitions
The horizontal piece of material at the threshold...
Ancestry of “doorsill”, step by step
doorsill traces back through two separate lines of ancestry.