What words use the on’yomi setsu for this kanji 切?
I often find if I can tie a word to the 'yomi, it helps me remember, but 大切 (taisetsu) isn’t really doing it for me.
(and if you have a good online dictionary that gives more examples, a link would be lovely!)
One or two levels back I learned 切腹 せっぷく. Switch the kanji around and you get 腹切り はらきり. Perhaps not super useful, but it’s two cool words I knew since long before studying japanese.