I. noun
also tre·nail or trun·nel ˈtrēˌnāl, ˈtren ə l, ˈtrən ə l
( -s )
Etymology: Middle English trenayle, from tre, tree tree, wood + nayle, nail nail — more at nail
1. : a wooden pin or peg made ordinarily of dry compressed timber so as to swell in its hole (as in a wooden ship) when moistened and used chiefly for fastening planking and ceiling to frames
2. : gutta
II. transitive verb
: to fasten with treenails