Sentence:  Newfoundland guides, trying to point out to a fisherman a salmon in the water, may say: "You have to <WSD>undersee</WSD> the shine." Ken has a remarkable ability to "<WSD>undersee</WSD> the shine." He is not deceived by surfaces. 
Meaning of the word marked with <WSD> tags:  To see or look under or below; see below the surface of.