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.

codness

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

I have been diagnosed with severe codness

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.

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.