Vocabulary What does かちかち mean? かちかち means rock-hard, stiff (dried-out bread, ice, frozen ground; also a rigid or nervous person). Quick factsReadingかちかち かちかちかちかちTOPICSrock-hard, stiff (dried-out bread, ice, frozen ground; also a rigid or nervous person)Example sentences冷凍庫(れいとうこ)に入(い)れたパンがかちかちに固(かた)まってしまった。The bread I put in the freezer froze rock-hard.