| discreet | discerning, judicious, prudent |
| dull | make undiscerning, make insensitive |
| imperceiverant | [unclear meaning] unperceptive, undiscerning |
| presaging | portending, discerning, insightful |
| sharp | witty, sharp-witted, discerning |
| unskilful | undiscerning, ignorant, uneducated |