(a.) Relating to, or consisting of, circumlocutions; periphrastic; circuitous.

O-shaped aberrant aberrative ambagious anfractuous backhand backhanded circular circumlocutional circumlocutory collateral convolutional deflectional departing desultory deviant deviating deviative deviatory devious digressive discursive divagational divergent errant erratic excursive flexuose flexuous helical indirect involute involuted involutional labyrinthine left-handed mazy meandering meandrous oblique orbital out-of-the-way periphrastic planetary rambling rivose rivulose rotary round roundabout roving ruffled serpentine shifting side sidelong sinister sinistral sinuate sinuose sinuous snaky spiral stray swerving torsional tortile tortuous turning twisting twisty undirected vagrant veering wandering whorled winding wreathlike wreathy zigzag