On this page you can get a detailed analysis of a word or phrase, produced by the best artificial intelligence technology to date:
Tenterhooks or tenter hooks are hooked nails in a device called a tenter. Tenters were wooden frames which were used as far back as the 14th century in the process of making woollen cloth. They are now superseded by stenter pins.
The phrase "on tenterhooks" has become a metaphor for nervous anticipation.