Well, "slithy" means "lithe and slimy." "Lithe" is the same as "active." You see it's like a portmanteau - there are two meanings packed up into one word.

Alice came to a fork in the road. 'Which road do I take?' she asked. 'Where do you want to go?' responded the Cheshire Cat. 'I don't know,' Alice answered. 'Then,' said the Cat, 'it doesn't matter.

Do let's pretend that I'm a hungry hyena, and you're a bone!

Whenever the horse stopped (which it did very often), he fell off in front; and, whenever it went on again (which it generally did rather suddenly), he fell off behind. Otherwise he kept on pretty well, except that he had a habit of now and then falling off sideways; and, as he generally did this on the side on which Alice was walking, she soon found that it was the best plan not to walk quite close to the horse.

To the Looking-Glass world it was Alice that said 'I've a sceptre in hand, I've a crown on my head. Let the Looking-Glass creatures, whatever they be, Come and dine with the Red Queen, the White Queen, and me.

Keep your temper, said the Caterpillar.

Crawling at your feet,' said the Gnat (Alice drew her feet back in some alarm), `you may observe a Bread-and-Butterfly. Its wings are thin slices of Bread-and-butter, its body is a crust, and its head is a lump of sugar.' And what does IT live on?' Weak tea with cream in it.' A new difficulty came into Alice's head. `Supposing it couldn't find any?' she suggested. Then it would die, of course.' But that must happen very often,' Alice remarked thoughtfully. It always happens,' said the Gnat.