Merriam-Webster: Main Entry: 1goad Pronunciation: 'gOd Function: noun Etymology: Middle English gode, from Old English gAd spear, goad; akin to Langobardic gaida spear, and perhaps to Sanskrit hinoti he urges on 1 a : something that pricks like a goad : THORN b : something that urges or stimulates into action : SPUR 2 : a pointed rod used to urge on an animal synonym see MOTIVE ,
Your word is also a type of tree, an adejective meaning "full of pus," and some variety of skunk.
The context will tell if those are what is meant.