word parts

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

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Word part	Type	Origin	Definition
-oid	adjective- and noun-forming suffix	Greek	resembling, like
olig, oligo	root	Greek	few; deficiency
omni-	prefix	Latin	all
onomas, onomat	root	Greek	name
ont, onto	root	Greek	being, existence
onym	root	Greek	name, word
op-	prefix	Latin	towards; against; away
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

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