"neglect, negligence," 1590s, but by 1700 surviving only as a word in Shakespeare, from Latin neglectionem (nominative neglectio) "a neglecting," noun of action from past-participle stem of neglegere (see neglect (v.)).
negatory
negentropy
neglect
neglected
neglectful
neglection
negligee
negligence
negligent
negligible
negotiable