Agreed, in a way

• Assented, at an auction
• Gestured yes
• By playing three of diamonds one indicated support
• Silently assented
• Dozed, with "off"
• Indicated approval
• Bid, perhaps
• Silently agreed
• Showed assent

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Nod \Nod\, v. t. [imp. & p. p. Nodded ; p. pr. & vb. n. Nodding .] To incline or bend, as the head or top; to make a motion of assent, of salutation, or of drowsiness with; as, to nod the head. To signify by a nod; as, to nod approbation. To cause to bend. ...