Humic
Part of speech: adjective
Definition: of, or relating to humus
Dirt
Part of speech: noun
Definition: Soil or earth.A stain or spot (on clothes etc); any foreign substance that worsens appearance.Previously unknown negative facts (or invented "facts") about a person, gossip.
Example sentence: The difference between keeping things clean and keeping kids clean was that things just sat still and waited for the dirt to collect. We kids were carriers. We ran a pickup and delivery service.