~ 1
■ suffix (forming nouns) denoting a person or thing performing the action of a verb, or denoting another agent: escalator.
Origin
from L., sometimes via Anglo-Norman Fr. -eour or OFr. -eor (see also -ator ).
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~ 2
■ suffix forming nouns denoting a state or condition: terror.
Origin
from L., sometimes via OFr. ~ , -ur .
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~ 3
■ suffix forming adjectives expressing a comparative sense: junior.
Origin
via Anglo-Norman Fr. from L.
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~ 4
■ suffix US form of -our 1 .