unbowed (adj.)
- direct
- even
- flat
- horizontal
- level
- lineal
- linear
- rectilineal
- rectilinear
- right
- smooth
- straight
- streamlined
- true
- unbeaten
- unbending
- unbent
- unbroken
- unconquered
- uncurved
- undefeated
- undeviating
- undistorted
- uninterrupted
- unsubdued
- unswerving
- unturned
- unvanquished
- upright
- vertical
