incremental

If you are making incremental progress in math, you are moving slowly but steadily forward. Incremental describes regular, measurable movements that are usually small.

Sometimes a basketball team might make a huge improvement, like a team that is 32-50 one year and then 50-32 the next. More often, progress is small and tiny — incremental. Anytime something is changing in any way, and the change is slow and steady, you can talk about incremental changes. A lot of life is like that. You might prefer to be making great or even miraculous progress, but incremental gains are better than none at all.

Definitions of incremental
1

adj increasing gradually by regular degrees or additions

“lecturers enjoy...steady incremental growth in salary”
Synonyms:
additive
characterized or produced by addition

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