unbent

consecutive nonstop short smooth solid straightforward successive true

beeline direct even horizontal invariable level perpendicular plumb right running square upright vertical

collinear continuous erect in a line in a row in line inflexible like an arrow lineal linear near precipitous rectilineal rectilinear sheer through unbroken uncurled undeviating undistorted uninterrupted unrelieved unswerving

broken incontinuous intermittent

level uneven varying

curved twisted

erect not cured straight upright

defeated