For example, the prefix un- can be attached to the adjective happy to create the negative adjective unhappy.
Note that there is no difference in meaning between these two forms.
affirmative | | negative |
| negative prefix | | not |
Tom is happy. | Tom is unhappy. | Tom is not happy. |
Words that take a– as a negative prefix always begin with a consonant.
affirmative | | negative |
political | apolitical |
sexual | asexual |
theist | atheist |
Words that take dis– as a negative prefix may begin with a vowel or a consonant.
affirmative | | negative |
agree | disagree |
comfort | discomfort |
mount | dismount |
orient | disorient |
Words that take il– as a negative prefix always begin with the letter l.
affirmative | | negative |
legal | illegal |
legible | illegible |
literate | illiterate |
logical | illogical |
Words that take im– as a negative prefix always begin with the letter m or p.
affirmative | | negative |
mobile | immobile |
moral | immoral |
perfect | imperfect |
possible | impossible |
Words that take in– as a negative prefix can begin with a vowel (except i or u) or a consonant.
affirmative | | negative |
accurate | inaccurate |
eligible | ineligible |
organic | inorganic |
decent | indecent |
sane | insane |
Note: There are many words that begin with in– that are not words with a negative prefix. For example:
word | | does not mean |
incline | not cline |
indulge | not dulge |
insist | not sist |
invoke | not voke |
Words that take ir– as a negative prefix always begin with the letter r.
affirmative | | negative |
rational | irrational |
reconcilable | irreconcilable |
regular | irregular |
resistible | irresistible |
Words that take non– as a negative prefix may begin with a vowel or a consonant.
affirmative | | negative |
conformist | nonconformist |
essential | nonessential |
fiction | nonfiction |
sense | nonsense |
Words that take un– as a negative prefix may begin with a vowel or consonant.
affirmative | | negative |
able | unable |
interesting | uninteresting |
usual | unusual |
comfortable | uncomfortable |
helpful | unhelpful |
prepared | unprepared |
Remember, not all words that appear to have a negative prefix are negative.
word | | does not mean |
alike | not like |
discuss | not cuss |
universe | not iverse |
illuminate | not luminate |
important | not portant |
involve | not volve |
irrigate | not rigate lawlessenglish.com
Exercise 1
Exercise 2
Exercise 3 |