| It would prove an insurmountable or even lethal obstacle to most cracksmen. |
| Farmers often see them as a nuisance, an unwanted obstacle dividing up valuable grazing land. |
| To the British, that unsubjugated savage kingdom constituted an intolerable obstacle to progress. |
| In springtime, the tule marshes trapped floodwaters, and for miners and early travelers they were yet another obstacle to movement. |
| A bigger obstacle to hurling progress is the number of players unwilling to commit to the cause. |
| We had not yet been able to find the way to overcome this obstacle to the revolution in our countries. |
