An animal is tame if it is not afraid of people, and is friendly to them. Tame animals generally won't try to hurt people or run away.
The opposite of tame is wild, and a similar word to tame is domesticated.
A tank is a vehicle used by the military. Tanks are heavily armoured to protect the people inside them, and they have a large gun that can rotate in any direction. Tanks have tracks instead of tyres, so they can travel over almost any kind of landscape.
Tanzanite is a mineral that looks a different colour depending on what angle you look at it from - it can be sapphire blue, violet, or burgundy. Tanzanite is a rare gem, found mostly in the foothills of Mount Kilimanjaro.
A tap or faucet is a device you usually find on a washbasin, sink or in your garden. when you turn it on, water comes out. Taps can have a lever you move up and down to turn them on and off, or a handle that you twist around. Usually people mean an indoor tap when they say faucet.