Something is alive if it is able to grow and reproduce. When something that was alive stops being alive, it is dead.
Balancing is the ability to stay still in a situation you'd normally be very wobbly in. For example, you need to balance to stand on a ball, or walk along a tightrope. You can also balance other things other than yourself. You can balance a pen across the end of your finger, or balance a cup on the end of your nose.
Someone is a captive if they are restrained and do not have their freedom. Someone or something may be held prisoner in a cage, tied or chained up so they can't escape or are simply held captive by verbal threats.
Something is dead if it used to be alive once but isn't any more. All living things will eventually die, but some can live for much longer than others.
Something is false if it is not true, is not correct, or is wrong. Sometimes an imitation of something real is called false, for example false teeth.
Something is free if it is being given away, without any kind of cost attached to it. See also: freedom.
Freedom is the state of being free. You are free if you can do as you please and go where you please. Freedom means there are no restrictions on you, either physical ones or ones enforced by rules and laws. A similar word to freedom is liberty, release or loose. The opposite of free might be restrained, captive or contained. See also: free, something you don't need to pay for.
Something is incomplete if it hasn't been finished yet. A similar word to incomplete is unfinished. The opposite of incomplete is complete or finished.
Something is off if it is not powered up and available to be used. The computer in the picture is switched off. Off also can be used to indicate something no longer attached to something else: "the branch broke off the tree", or for reducing something: "take ten percent off the price". The opposite of off is on.