Morgan Stanley analysts recently included this chart of crude production costs. Onshore Middle East oil sites are much cheaper to tap than North American shale, which costs about $65 per barrel to extract.
1. ponder-reflect deeply on a subject; I mulled over the events of the afternoon; philosophers have speculated on the question of God for thousands of years; The scientist must stop to observe and start to excogitate.
Synonyms for obstruction in Free Thesaurus. Antonyms for obstruction. 49 synonyms for obstruction: obstacle, bar, block, difficulty, barrier, hazard, barricade, snag, impediment, hindrance, blockage, stoppage, occlusion, hindrance. What are synonyms for obstruction?