Sentence:  Jones' sad eyes <WSD>betray</WSD> a pervasive pain his purposefully spare dialogue only hints at, while the perfectly cast Brolin conveys hints of playfulness and warmth while staying true to the craggy stoicism at the character's core. 
Meaning of the word marked with <WSD> tags:  To disclose or indicate, for example something which prudence would conceal; to reveal unintentionally.