Re: kanji for, and meaning of, suki
The radical on the left hand side I think means bridge.
On the right hand side there is
日 day or sun
So although John and Peter are right of course about etymology it is not inconceivable that there is a nuance of a chink of sunlight... It helps me to remember it, anyway!
A book I liked a lot was A guide to remembering Japanese characters by Kenneth G. Henshall. It explains a lot of interesting stuff about etymology clearly and simply.