treenail

noun
tree·​nail | \ˈtrə-nᵊl \
variants: or or less commonly trenail

Definition of treenail 

: a wooden peg made usually of dry compressed timber so as to swell in its hole when moistened

First Known Use of treenail

13th century, in the meaning defined above

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The first known use of treenail was in the 13th century

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