Which prefix can be used before all the following words: Proper, polite, mortal, movable
- AUm-
- Bln-
- CIr-
- DIm-
Solution & Step-by-step Explanation
For base words beginning with the bilabial consonant letters 'p' or 'm', the negative prefix element transforms morphologically into 'im-' for phonetic ease. This yields the valid derived opposites: Improper, impolite, immortal, and immovable.