Murong Xuecun, China's Television War on Japan. International New York Times (Paris), Feb 10, 2014 (op-ed)
Note: "CAI Yang 蔡 洋, a 21-year-old construction worker in Xi’an, smashed the skull of LI Jianli 李 建利, the owner of a Japanese car, with a bicycle lock. Mr Cai’s mother, explaining the source of her son’s 'patriotic' rage, couldn’t have been more trenchant with her question: 'When we turn on the TV, most of the dramas are about anti-Japanese war. How would it be possible to not to hate Japanese?'
(a) trenchant (adj; Middle English trenchaunt, from Anglo-French, present participle of trencher) www.merriam-webster.com/dictionary/trenchant
(b) trench (n; Middle English trenche track cut through a wood, from Anglo-French, act of cutting, ditch, from trencher, trenchierto cut, probably from Vulgar Latin *trinicare to cut in three, from Latin trini three each) http://www.merriam-webster.com/dictionary/trench