footbreadth means the breadth of a foot; used as a measure. Lexicurio rates it Sui generis — a strength score of 88 out of 100.
noun
- The breadth of a foot; used as a measure.“Meddle not with them; for I will not give you of their land, no, not so much as a footbreadth; because I have given Mount Seir unto Esau for a possession.”