Certain symptoms are unique depending on the underlying cause of the sciatica. For example, bending the body backward or walking more than a short distance often triggers symptoms when spinal stenosis is the cause. Bending the body forward may trigger symptoms if the cause is a lumbar herniated disc. Sciatica Symptoms for Each Nerve Root
Wiktionary(4.00 / 1 vote)Rate this definition: 1  repugnant(Adjective) Offensive or repulsive; arousing disgust or aversion. 2  repugnant(Adjective) Opposed or in conflict.
Around page 197 you describe some of the reasons to care about usage. One of the reasons that resonates with me is efficiency of communication. A writer and reader who understand the meaning of repugnant can communicate using a single word where otherwise they would need several. The same applies to restrictive vs. nonrestrictive clauses, and many other aspects of grammar.