i Register
In some senses, disincrease is marked as rare. Watch for register when choosing this word.
noun
The reduction of something that has increased or that typically increases.
It takes brisk, frosty weather for this lest the meat should spoil before being salted down and put away; and the darkies say it is bad luck to kill hogs except in “the disincrease" of the moon.
In the case of martyrs their death does not diminish the Church but enlarges it, because their blood "engendereth new supply and it increaseth the more when the disincrease thereof is violently procured.
verb
To diminish; to decrease in size or number.
My people have been so unhappy for a long time they wish now to disincrease, instead of multiply.
The difference between the large and the small vocabulary is evidently not only that the proportion of words containing the component disincreases, but also that the analysis is much more complete as the vocabulary is increased.