PREFIXES AND SUFFIXES
Prefixes to form adjectives
il-, im-, ir-, in-
Not/opposite of
Illegal, Illegible, imperfect
impolite, irrelevant, irrational
un-
Not/opposite of
Unusual, unhappy
uninterested, unpleasant
dis-
Not/opposite of
Dishonest, disloyal
dissimilar, disabled
ultra-, super-, -hyper-
Extreme
Ultra-compact
ultrasound, hyperactive
inter-
Between
International
interdisciplinary
trans-
Across
Transatlantic
Transmarine
Suffixes to form adjectives
-able/-ible
Worth, ability
Solvable, accessible, believable
-al, -ial, -ical
Quality, relation
Professional, structural, national
-ent/-ant
Having a certain quality
Important, dependent, relevant
Animals
Having the quality of
Bored, interested, fascinated
-ic
Quality, relation
Generic, archaic, idealistic, historic
-ing
Referring to an activity
Boring, interesting, fascinating
-ish
Having the character of, about, almost
Newish, reddish
-ful
Having a characteristic
Helpful, colorful, useful
-less
Without, missing
Worthless, careless, useless, hopeless
-ous
Having the quality of, relating to
Adventurous, courageous
-ive
Having the quality of
Festive, cooperative, sensitive