1) A spike-nail; that is a large and strong nail.
1299-1300 Et in spikynges ferris emptis ad eandem bercariam xxvjs ixd, Bolton Priory
a.1360 Pro clavis ferri, videlicit, spykynges et broddes et aliis 16s, York
1446-7 c dimidia clavis vocatis spykyngs, Beverley. References to single, middle and double spikings were also frequent and these words gave rise to by-names: 1379 John Spikyng, Bishop Monkton, and field names: 1323 Spikyng, Snaith
1541 Singlespyk, Tadcaster. Such names were common enough for us to suspect that they described a narrow triangular piece of land and that this was the shape of the nail.