Hebrew yathed, "piercing," a peg or nail of any material (Ezekiel 15:3), more especially a tent-peg (Exodus 27:19; 35:18; 38:20), with one of which Jael (q.v.) pierced the temples of Sisera (Judges 4:21,22). This word is also used metaphorically (Zechariah 10:4) for a prince or counsellor, just as "the battle-bow" represents a warrior.
Masmer, a "point," the usual word for a nail. The words of the wise are compared to "nails fastened by the masters of assemblies" (Eccl 12:11, A.V.). The Revised Version reads, "as nails well fastened are the words of the masters," etc. Others (as Plumptre) read, "as nails fastened are the masters of assemblies" (Compare Isaiah 22:23; Ezra 9:8). David prepared nails for the temple (1 Chronicles 22:3; 2Chr 3:9). The nails by which our Lord was fixed to the cross are mentioned (John 20:25; Colossians 2:14).
Nail of the finger (Heb. tsipporen, "scraping"). To "pare the nails" is in Deuteronomy 21:12 (marg., "make," or "dress," or "suffer to grow") one of the signs of purification, separation from former heathenism (Compare Leviticus 14:8; Numbers 8:7). In Jeremiah 17:1 this word is rendered "point."
These dictionary topics are from M.G. Easton M.A., D.D., Illustrated Bible Dictionary, Third Edition, published by Thomas Nelson, 1897. Public Domain, copy freely.
Easton, Matthew George. "Entry for 'Nail'". "Easton's Bible Dictionary".