Antonyms of adj uncurving

1 sense of uncurving

Sense 1
uncurved, uncurving -- (having no curves)

INDIRECT (VIA straight) -> curved, curving -- (having or marked by a curve or smoothly rounded bend; "the curved tusks of a walrus"; "his curved lips suggested a smile but his eyes were hard")

Similarity of adj uncurving

1 sense of uncurving

Sense 1
uncurved, uncurving -- (having no curves)
       => straight (vs. curved) -- (free from curves or angles; "a straight line")