Dwindle down is a phrase that describes a gradual decrease or diminishing of a particular thing. Sometimes, when writing, it is useful to find alternative words or phrases to express the same thing. There are several synonyms for dwindling down that can be used, such as "taper off," "diminish," "reduce," "slim down," "deplete," "shrink," "lessen," "contract," "wane," and "narrow." Each of these words has a slightly different connotation, and the writer must choose the one that best fits the context in which it will be used. Regardless of which synonym is used, the meaning is the same: a gradual decrease over time.