When something is commandeered, it is taken or seized, usually by force.
A commendation is a giving of praise to someone who has won approval for excellent work.
When an order is countermanded, it is canceled or reversed.
A mandate is an official order or command issued by a government or other authorized body.
When you demand that something happen, you give an order or command that it be done.
When someone recommends something to you, they say that you should do it too based on their own good past experience with it; therefore, they think it would be useful or good for you as well.
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