| DU | (of color) very low in saturation |
|---|---|
| DU | slow to learn or understand |
| DU | darkened with overcast |
| DU | not having a sharp edge or point |
| DU | not keenly felt |
| DU | lacking in liveliness or animation |
| DU | so lacking in interest as to cause mental weariness |
| DU | being or made softer or less loud or clear |
| DU | not clear and resonant |
| DU | blunted in responsiveness or sensibility |
| DU | a person who evokes boredom |
| DU | a person who is not very bright |