Which word is a synonym for "gradually increase"?

The term "accretion" refers to a process of gradual growth or increase, particularly in relation to the accumulation of additional elements or layers. This concept aligns perfectly with the idea of something increasing gradually over time. In various contexts, such as finance, ecology, or geology, "accretion" is used to describe how certain aspects accumulate incrementally, reflecting a continuous and gradual enhancement.

The other words do not share this meaning. "Accolade" relates to praise or recognition, "abate" denotes a reduction or decrease, and "acquit" pertains to absolving someone from a charge or responsibility. Thus, "accretion" stands out as the most fitting synonym for the concept of gradual increase.