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What is the opposite of diagonal?

Need antonyms for diagonal? Here's a list of opposite words from our thesaurus that you can use instead.

Adjective
Opposite of having, or running in, a slanted or oblique direction
Adjective
Opposite of running or lying across
Adjective
Opposite of situated or extending across something
Adjective
Opposite of having, or running in, a slanted or oblique direction
Adjective
Opposite of lying or placed across
“The blasts struck in rapid succession during rush hour on two parallel and adjacent streets in a poor district of the city.”
Noun
Opposite of an inclined surface or slope
Noun
Opposite of a sloped surface or line, or the fact or state of being sloped
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