neglekti

A false seam with a real one hiding behind it, which makes it the most instructive word in the band after reflekti.

The false seam first. Neglekti looks like ne plus glekti, and Esperanto's ne- really does negate: nekredebla, nekonata, nescii. But there is no glekti. Search the whole dictionary and it is not there, because it never existed in any language; the root here is neglekt-, borrowed entire, and it neither splits nor recombines. Try to build anything from the imagined half and you produce nothing.

Now the real seam. Latin neglegere is nec plus legere, not-to-gather, and legere is the same verb that gave English legible, lecture and collect. So the negative a learner thinks they can see in neglekti is not a hallucination, it is a fossil: correct about the history, wrong about the Esperanto. This is exactly the pattern the course met at inspiri rank 1727, where spiri sits visibly at 611 and yet in- is not doing prefix work. Being right about Latin and wrong about Esperanto is a specific and very common way to be wrong, and it is worth learning to recognise it in yourself.

What to say instead, when you want the built form. Esperanto has perfectly good compositional options for the same territory: malzorgi (the opposite of zorgi, to fail to look after), ne atenti (to pay no attention), lasi flanken (to set aside). Neglekti is the heavier, more formal one, and it carries a note of blame the others do not. A garden can be neglektita; so can a duty, a warning and a friendship.