過か

prefix

surplus-; excess-; over-

Prefix used to indicate an excessive amount or degree, often with a negative connotation. Common in words like 過労 (overwork) and 過食 (overeating).

• 過か労ろうで倒たおれる人ひとが増ふえている。

  The number of people collapsing from overwork is increasing.

• 過か食しょくは健けん康こうに悪わるい。

  Overeating is bad for your health.

prefix

per- (chemical)

Chemistry prefix indicating a higher oxidation state or more of a certain element than usual. Seen in terms like 過酸化水素 (hydrogen peroxide).

• 過かマンガン酸さんカリウムは酸さん化か剤ざいとして使つかわれる。

  Potassium permanganate is used as an oxidizing agent.