100 Most Common Word Roots, Prefixes, and Suffixes

Understanding the building blocks of English vocabulary accelerates every aspect of word game performance. Players who know the most common roots and affixes can decode unfamiliar words, extend existing ones on a Scrabble board, and recognize crossword answers even without specific knowledge of the word.

Top 20 Prefixes

UN- (not, opposite): unable, undo, unfair. RE- (again, back): redo, return, replay. IN- (not, into): inside, invalid, include. DIS- (not, away): disagree, disconnect, displace. OVER- (above, excessive): overdo, overflow, overcome. PRE- (before): preview, predict, prepare. INTER- (between): interact, interview, international. MIS- (wrong): mistake, misplace, misjudge. ANTI- (against): antisocial, antibiotic, antifreeeze. TRANS- (across): transport, transfer, translate.

Top 20 Suffixes

-ING (present participle): running, playing, working. -ED (past tense or adjective): played, worked, tired. -TION/-SION (state, action): nation, tension, mention. -ER/-OR (one who): player, actor, teacher. -LY (manner): quickly, happily, calmly. -NESS (state of): happiness, sadness, fitness. -LESS (without): hopeless, careless, endless. -FUL (full of): hopeful, careful, faithful. -ABLE/-IBLE (capable of): capable, visible, edible. -MENT (action, result): movement, treatment, payment.

Top 10 Greek Roots for Word Games

BIO (life): biology, biography, antibiotic. GEO (earth): geography, geology, geometry. GRAPH (write): photograph, paragraph, autograph. LOG (word, study): biology, geology, apology. PHON (sound): phone, symphony, microphone. PSYCH (mind): psychology, psychiatry, psychic. THERM (heat): thermometer, thermostat, thermal. SCOPE (view): microscope, telescope, periscope. TELE (far): television, telephone, telescope. ASTRO (star): astronomy, astronaut, disaster.