Disabelled

When I was still in high school, there ran an ad campaign to convince potential employers in Ontario that the handicapped were quite capable of performing most jobs.
     Their slogan was: “Label us able!”
     Now, I have always been a pretty good speller, but there are a number of outlying words that still give me trouble, and so I latched onto this as a useful mnemonic for sorting out which of those words should end in “–le” and which in “–el.”
     The problem is that I got it all wrong and became convinced that “lable” was the way to go.