Boyd’s Bible Dictionary:
(hoe). A crude hoe (Isa. 7:25).
Concise Bible Dictionary:
1. chereb, probably sword or tool (2 Chron. 34:6, the margin reads “mauls”).
2. machareshah, plowshare, coulter (1 Sam. 13:20, 21).
Hoe
3. mader, probably a hoe or spade (Isa. 7:25).
Strong’s Dictionary of Hebrew Words:
Transliteration:
machareshah
Meaning:
from 2790; probably a pick-axe
From Manners and Customs of the Bible:
Isaiah 7:25. On all hills that shall be digged with the mattock.
This instrument was probably similar to our grub-ax, and was made of either wood or iron. It was used in mountainous places, where a plow could not be easily handled, for turning up the soil. This fact is referred to in the text.