cod-ant

a rogue ant which escapes its colony and reverts to the life of a cod rider. It is a rare creature however it has been spotted riding cods across the colder waters and deeper sea regions throughout the North Atlantic.

The cod-ant travelled gracefully through the water, two minds as one.

codded

Past tense of cod meaning depress aka I was depressed means I was codded

I codded someone.

coddy

present participle of cod meaning depress aka that's depressing means that's coddy

Why is life so coddy.

codders

(of a person) in a state of unhappiness or despondency aka to be depressed is to be codders

I am codders

codders

past participle of cod meaning depress aka I feel depressed means I feel codders

We're so codders.

codness

feelings of severe despondency and dejection aka to suffer from depression is to suffer from codness

I have been diagnosed with severe codness

coddant

reducing functional or nervous activity/causing extreme sadness aka a depressant is also known as a coddant.
there is also the anti-coddant.
Note: coddant is not to be confused with the cod-ant

That is a coddant because it causes codness.