Definitions

1. noun

a small nail, especially one used to attach a thin piece of material, such as a hinge pin, to a surface, or a small metal pin used in a particular trade, such as in the making of shoes.

“The cobbler carefully hammered the trenail into the shoe’s sole.”

2. noun

a small metal pin or nail used to attach a piece of leather to the upper part of a shoe.

“The shoe repairman inserted a new trenail to secure the loose leather strap.”