Antonym Prefixes
"Im-" is used before words starting with b, m, or p: impossible, imbalance, impatient, immature, imperfect. "Il-" is used before words starting with l: illegal, illogical, illiterate, illegible. "Ir-" is used before words starting with r: irrelevant, irregular, irresponsible, irrational, irreversible. The consonant doubling (im+m, il+l, ir+r) gives a clue to the correct prefix.
"Im-" is used before words starting with b, m, or p: impossible, imbalance, impatient, immature, imperfect. "Il-" is used before words starting with l: illegal, illogical, illiterate, illegible. "Ir-" is used before words starting with r: irrelevant, irregular, irresponsible, irrational, irreversible. The consonant doubling (im+m, il+l, ir+r) gives a clue to the correct prefix.
Practice
Parking here is ___.
Changing the past is completely.
Put the words in the correct order: