Extremely hard
Crossword Clue

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AnswerCrossword Clue
ADAMANTExtremely hard.
RACKONESBRAINSThink extremely hard
RAREExtremely hard to find
BORONNonmetallic element, extremely hard.
borazonan extremely hard synthetic compound
toilingWork extremely hard or incessantly
borazonsBORAZON, an extremely hard synthetic compound
quartziteAn extremely compact, hard, granular rock consisting essentially of quartz. It often occurs as silicified sandstone, as in sarsen stones
borazonsbrand name for a cubic, diamondlike, extremely hard form of boron nitride, obtained at high temperatures and pressures: used as an abrasive and grinding agent
borazonbrand name for a cubic, diamondlike, extremely hard form of boron nitride, obtained at high temperatures and pressures: used as an abrasive and grinding agent