in no small measure
To considerable degree
In no small measure means to a significant degree or extent—a deliberate understatement that emphasizes importance.
Her success was due in no small measure to her mentor's guidance.
The phrase uses litotes, saying "not small" to mean "quite large," lending a formal or literary quality to what could simply be said as "largely" or "significantly."
- largelyTo great extent
- significantlyTo meaningful extent
- substantiallyTo a significant degree
- immenselyTo vast degree
- considerablyBy a large margin
vastly · decisively · greatly · a great deal · extensively · notably · profoundly · strikingly · strongly · appreciably · heavily · markedly · materially · by a wide margin · a lot · hugely · enormously · tremendously