名詞 undercoat:

1. seal consisting of a coating of a tar or rubberlike material on the underside of a motor vehicle to retard corrosion
   同義詞：underseal
2. the first or preliminary coat of paint or size applied to a surface
   同義詞：flat coat, ground, primer, priming, primer coat, priming coat
3. thick soft fur lying beneath the longer and coarser guard hair
   同義詞：underfur

動詞 undercoat:

1. cover with a primer; apply a primer to
   同義詞：prime, ground

1. An undercoat of paint or size applied to prepare a surface, as for painting.
   底漆，涂底料油漆之前，涂在某一表面上作準備的底漆或涂料
2. I want all the existing paint stripped off and new undercoat and gloss applied. I want a thorough job, with no half measures.
   我要把原有的油漆全部鏟去，并要涂上新的內涂層和上光劑。我要徹底地干一下，決不馬馬虎虎。