trunnel

Noun

treenail (plural treenails)

1. A wooden peg or pin used as a fastener.
   • OPERATION—The wood for the treenail is fixed in G; the balance wheel is then moved....1847, editorial staff, “TREENAIL MACHINE”, in Scientific American, series 1, Volume 3, Issue 10, page 73

Noun

trundle (plural trundles)

1. (obsolete) A low wagon or cart on small wheels, used to transport things.
   • […] you may […] place the whole weighty Clod upon a Trundle to be convey’d, and Replanted where you please,1670, John Evelyn, chapter 3, in Sylva, or, A Discourse of Forest-Trees, London, page 21
2. (obsolete) A small wheel or roller.
3. A motion as of something moving upon little wheels or rollers; a rolling motion.
   • There was something expert and even vicious in the flick of Paul’s arm and the hard momentary trundle of the [cricket] ball along the curving rails.2011, Alan Hollinghurst, The Stranger’s Child, New York: Knopf, Part 3, Chapter 6, p. 276
4. The sound made by an object being moved on wheels.
   • […] an old man who could always be located from far away by the sound of a scythe or the trundle of a wheelbarrow.1943, Graham Greene, The Ministry of Fear, London: Heinemann, Book 2, Chapter 1, section 5, p. 143
5. A lantern wheel, or one of its bars.
   • The Cog-wheels in most Wind-Mills are (in the diameter) 8. foot or under […] the trundle is at the least two foot, which is 4. to one.1651, Cressy Dymock, An Invention of Engines in Motion, London: Richard Woodnoth, page 5
6. (rare) A spool or skein of golden thread (chiefly in the arms of the Embroiderers Company, now the Company of Broderers).
   • between as many Trundles, Or […]1724, John Guillim, A Display of Heraldry, page 14

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