Thursday Morning Riddle

I’m a tool used in cooking and eating a steak;
I’m where river meets river, when not at a lake;
I’m an instrument tuner; the tongue of a snake;
And a knight move that puts queen and rook both in take.

Who am I?

UPDATE: Riddle solved by DeLisa. See comments for answer.

2 Responses to “Thursday Morning Riddle”

  1. DeLisa Says:

    Fork

  2. Bill Says:

    Stick a FORK in this riddle, because it’s done. Way to go, DeLisa!

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