I think this word means: Understanding.

Actual definition: \NEL, verb:

1. The stroke of a bell tolled at a funeral or at the death of a person; a death signal; a passing bell; hence, figuratively, a warning of, or a sound indicating, the passing away of anything.

intransitive verb:
1. To sound as a knell; especially, to toll at a death or funeral; hence, to sound as a warning or evil omen.