But again it's sampla specific. Maybe cfisisku is a more generic word than any one word that we have in english. Maybe it's gloss is just "fault find".
One of my biggest pet peeves with the apparent process for defining lujvo in the community is this mindset of "ok what would the english gloss for that be? Can't think of one? Ok, must be a bad word. Let's shoehorn he definition into something else so we can have a nice english gloss.
I propose: cfisisku = lo sisku cu sisku lo cfalu lo te sisku
However you want to define that in english is fine with me.