Etymological root
ὀρθός
Ancient Greek
Words from this root(3)
orthodox
C2+
/ˈɔrθədɑks/
conforming to established or traditional beliefs, especially in religion
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orthogonal
C2+
/ɔrˈθɑɡənəl/
at right angles; statistically independent or unrelated
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orthoepy
C2+
/ɔrˈθoʊəpi/
the study of correct or accepted pronunciation of words
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