I maintain that any writer of a book is fully authorised in attaching any meaning he likes to a word or phrase he intends to use. If I find an author saying, at the beginning of his book, "Let it be understood that by the word 'black' I shall always mean 'white,' and by the word 'white' I shall always mean 'black,'" I meekly accept his ruling, however injudicious I think it.
When you have made a thorough and reasonably long effort, to understand a thing, and still feel puzzled by it, stop, you will only hurt yourself by going on.
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.
Child of the pure unclouded brow
And dreaming eyes of wonder!
Though time be fleet, and I and thou
Are half a life asunder,
Thy loving smile will surely hail
The love-gift of a fairy-tale.
In a Wonderland they lie, Dreaming as the days go by, Dreaming as the summers die: Ever drifting down the stream- Lingering in the golden gleam- Life, what is it but a dream?
O Oysters,' said the Carpenter, You've had a pleasant run! Shall we be trotting home again?' But answer came there none - And this was scarcely odd, because They'd eaten every one.