word parts

A-Z Word Parts Find roots and affixes with example words Word Parts GuideAbout this feature

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Word part Type Origin Definition
op, ops, opt, opto, ophthalm, ophthalmo, -opia, -opsy root Greek eye, visual condition, vision, sight, inspection
oper root Latin to work
opt1 root Latin best
opt2 root Latin choose
or, ora, ori root Latin mouth; speak, plead
orb root Latin wheel, circle
ord, ordin root Latin row, rank, order
ornith, ornitho root Greek bird
ortho root Greek straight, vertical, perpendicular; correct
-ory, -atory2 adjective-forming suffix Latin serving to, pertaining to
-ose1 adjective-forming suffix Latin having many or much of; tending toward
-ose2 noun-forming suffix Greek carbohydrate, esp. sugar
-osis noun-forming suffix Greek condition (usually medical)
-osity noun-forming suffix Latin state or condition of
oste, osteo root Greek bone
-otic adjective-forming suffix Greek having or related to (a condition or state)
oto, ot root Greek ear
-ous, -ious adjective-forming suffix Latin full of, characterized by
out- prefix Old English out, outside, outward; beyond, better, more
ov, ovi root Latin egg
over- prefix Old English excessively, too much; over, on top, above