(くふう)(かさ)ねる

くふうをかさねる
expression
to make repeated efforts; to refine through trial and error
effortwork
1. to make repeated efforts; to keep devising improvements; to refine through trial and error
To continue working on something by trying different approaches and making incremental improvements. Emphasizes persistent, creative effort over time rather than a single attempt.
工夫(くふう)(かさ)ねて、ようやく完成(かんせい)した
After repeated efforts, it was finally completed.
As a result of making improvements again and again, sales increased.
(あじ)満足(まんぞく)できず、工夫(くふう)(かさ)ねて(いま)レシピたどり()いた。
I wasn't satisfied with the taste, so I kept refining the recipe until I arrived at the current one.

Combines 工夫(くふう) (ingenuity; creative effort) with (かさ)ねる (to pile up; to repeat). The expression highlights the iterative nature of improvement — not just trying once but building on each attempt. It carries a positive connotation of diligence and craftsmanship.

Common collocations

Similar words