Some radicals are made up of other radicals, but we don’t get a list of a radical’s composite parts like we do for words or kanji.
I’ve been going back over some of the updated meanings for radicals (like 冓 - lifeguard) and it’s taking me a bit of time to figure out what the composite radicals are (for lifeguard I can see ‘task’, but I’m struggling to find the other part).
Do you have any good strategies for studying radicals and amending the (sometimes cryptic) default definitions?
The problem is that many radicals are not really built from other radicals, sometimes that are created completely on their own. WK is just trying to split stuff like 冓 to fit it more nicely into their system. (If you look closely the lowest horizontal line pierced both sides, so it just looks a bit like task but isn’t.)