| The outer windings seem to provide both the extra rigidity needed for motility in structured media and better propulsion in low viscosity media. |
| The plastic ribbing adds to the rigidity of the structure without a large increase in weight. |
| Skis have gotten softer over the years, as manufacturers have learned ways of building in torsional rigidity without lengthwise rigidity. |
| In other cases akinesia, dyskinesia, waxy flexibility, and cogwheeling may occur instead of or in addition to the classic rigidity. |
| The rigidity and adamancy to continue with the strike action until management appears to capitulate leads to a dead end. |
| And he was learned and perspicacious enough to see that the rigidity which the old Labour party embraced would entail its own reaction. |
