Just checking since the dictionaria gugulabilia seem to (very occasionally) include immorito (glossed here as "causelessly"; here as "undeſervedly") but never whatever intermediate form produced it. It seems to most often appear in New Latin in the construction non immorito, "not without reason".
Correct me if I'm wrong, but this seems to be an adverbial -o suffix on (apparently nonexistant) immoritus, which in turn is a negative im- prefix on (apparently equally nonexistant) moritus. I mean, there's moritus as a computer-misgenerated participle meaning "dead". That's off topic, right?
So is this just morus (Gr. moros, "stupid, moronic") with a needless -itus ("moronic-ish (?)") tacked on and really means "nonmoronically"? or does it come from somewhere else and something else is happening here?