duro-, dur-, dura-

1. Severe or gloomy, and unfriendly and unresponsive toward others.
2. Grimly and stubbornly determined.
3. Marked by sternness or harshness; a forbidding nature.
4. Etymology: "severe", from Scottish and northern England dialect, considered to be from Latin durus "hard"; the sense of "gloomy" is from about 1470.

The pronunciation of dour traditionally rhymes with "tour"; for example, DOOR. The variant pronunciation that rhymes with "sour" (DOUR) is also considered to be widely used and so it is also considered an acceptable pronunciation by some authorities.

Permanence by virtue of the power to resist stress or force; capable of lasting for a long time.

Lasting in spite of hard wear or frequent use.

Capable of withstanding wear or decay.

1. The tough outermost membrane of the three that cover the brain and the spinal cord.
2. Etymology: the "tough outer membrane surrounding the brain"; from about 1400, from Middle Latan dura mater cerebri; literally, "hard mother of the brain".