A word for “shoe” in The Etymologies of the late 1930s derived from primitive ᴹ✶skyapat- under the root ᴹ√SKYAP (Ety/SKYAP). In The Etymologies as published in The Lost Road, the gloss was “shore” (LR/386), but Vinyar Tengwar Errata confirmed the actual gloss was “shoe” (VTE for issue 46). The Old Noldorin form was ON. skhapa with the early loss of final *t*, but in modern Noldorin it seems the -d < -t was restored via the plural N. hebeid, which in Sindarin would be ✱hebaid since *ei* became *ai* in final syllables for Sindarin of the 1950s and 60s.
Conceptual Development: The Gnomish Lexicon of the 1910s had G. habin “shoe” derived from {ᴱ√sı̯ap >>} ᴱ√χı̯ap, appearing above G. habach “a big shoe, clog, sabot” of similar derivation (GL/47). Elsewhere in the document, Tolkien compared G. saib “boot” derived from ᴱ√SAYAP to (unglossed) hab (GL/66).
The meaning "shore" in Ety/386 should actually read "shoe", see VT/Errata and Lambengolmor/735. Compare also with Early Qenya hyapa (PE/13:41) and Gnomish habin (PE/11:47), both glossed as "shoe"