to make sharp or sharperwhetted the knife with the grindstone
whetted the knife with the grindstone
edge, grind, hone, sharpen, stone, strop
file
blunt, dull
buff, burnish, gloss, polish, round, smooth
before the 12th century
英语同义词词典收录了63618条英语词条，基本涵盖了全部常用同义词或反义词的辨析及翻译，是英语学习的有利工具。