un-: Not or opposite: unhappy, undo
re-: Again: redo, rewrite
dis-: Not or opposite: disagree, disappear
mis-: Wrongly: misspell, misread
pre-: Before: preview, preheat
in-: Not (before most letters): inactive, incorrect
im-: Not (before b, m, p): impossible, immature
il-: Not (before l): illegal, illogical
ir-: Not (before r): irregular, irresponsible
non-: Not: nonstop, nonfiction
over-: Too much: overeat, overdo
under-: Too little, or below: underpaid, underground
sub-: Under: submarine, subway
super-: Above or beyond: superhero, supermarket
inter-: Between: international, interact
trans-: Across: transport, transatlantic
semi-: Half: semicircle, semifinal
mid-: Middle: midnight, midway
fore-: Before: forecast, foresee
out-: Beyond or more than: outrun, outgrow
anti-: Against: antifreeze, antisocial
auto-: Self: autograph, automatic
bi-: Two: bicycle, biweekly
tri-: Three: triangle, tricycle
uni-: One: unicycle, uniform
multi-: Many: multicolor, multiply
poly-: Many: polygon, polyglot
mono-: One: monorail, monologue
de-: Opposite or remove: defrost, deform
en-: Make or put in: enlarge, encircle
em-: Make or put in: empower, embrace
ex-: Out or former: exit, ex-president
extra-: Beyond: extraordinary, extraterrestrial
hyper-: Over, too much: hyperactive
hypo-: Under: hypodermic
micro-: Very small: microscope
mega-: Very large: megaphone
milli-: One thousandth: milliliter
kilo-: One thousand: kilometer
centi-: One hundredth: centimeter
deci-: One tenth: decimeter
tele-: Far: telescope
photo-: Light: photograph
co-: Together: cooperate, coworker
con-: With or together: connect, convene
counter-: Against: counterclockwise
contra-: Against: contradict
pro-: For or forward: proceed, pro-peace
post-: After: postpone, postgame
ante-: Before: antecedent
intra-: Within: intrastate, intranet
circum-: Around: circumference
ambi-: Both: ambidextrous
pan-: All: panorama
omni-: All: omnivore
tetra-: Four: tetrahedron
penta-: Five: pentagon
hexa-: Six: hexagon
octo-: Eight: octopus, octagon
deca-: Ten: decade
dia-: Through or across: diameter
epi-: Upon: epidermis
peri-: Around: perimeter
a-: Without or not: asleep, amoral
mal-: Bad: malfunction
bene-: Good: benefit
equi-: Equal: equal, equator
homo-: Same: homophone
hetero-: Different: heterogeneous
neo-: New: neoclassical
paleo-: Old: paleontology
retro-: Backward: retrospect
sym-: Together: symphony
syn-: Together: synonym
vice-: In place of: vice president

Free flashcards from Peabody at peabody.kids/flashcards/la-prefixes