Goofed

• By playing three of diamonds one indicated support
• Agreed silently
• Assented, in a way
• Signalled agreement
• Let a slip pass
• Agreed, in a way
• Gestured yes
• Indicated 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. ...

WordNet Word definitions in WordNet
v. express or signify by nodding; "He nodded his approval" lower and raise the head, as to indicate assent or agreement or confirmation; "The teacher nodded when the student gave the right answer" let the head fall forward through drowsiness; "The old man ...