ろくに

adverb

(not) well; (not) properly; (not) enough

Used with a negative verb to express that something is not done adequately, properly, or to a satisfactory degree. Often implies a lack of effort or care.

• 彼かれはろくに勉べん強きょうもしないで試し験けんに落おちた。

  He failed the exam without studying properly.