Antonyms of adj writhen

1 sense of writhen

Sense 1
contorted, writhed, writhen -- (twisted (especially as in pain or struggle); "his mad contorted smile"; "writhed lips"; "my writhen features"- Walter scott)

INDIRECT (VIA crooked) -> straight -- (having no deviations; "straight lines"; "straight roads across the desert"; "straight teeth"; "straight shoulders")

Similarity of adj writhen

1 sense of writhen

Sense 1
contorted, writhed, writhen -- (twisted (especially as in pain or struggle); "his mad contorted smile"; "writhed lips"; "my writhen features"- Walter scott)
       => crooked (vs. straight) -- (having or marked by bends or angles; not straight or aligned; "crooked country roads"; "crooked teeth")