'eth (Hebrew #853)
properly, self (but generally used to point out more definitely the object of a verb or preposition, even or namely)
KJV usage: (as such unrepresented in English).
Pronounce: ayth
Origin: apparent contracted from 226 in the demonstrative sense of entity
nacah (Hebrew #5254)
to test; by implication, to attempt
KJV usage: adventure, assay, prove, tempt, try.
Pronounce: naw-saw'
Origin: a primitive root