na-adjective, noun which may take the genitive case particle 'no', noun
halfway; half-baked; half-hearted; incomplete
Describes something done without full commitment, left unfinished, or lacking thoroughness. Often carries a negative connotation of being unsatisfactory or irresponsible.
You can't succeed with a half-hearted attitude.
その計画は中途半端なまま終わった。
The plan ended up unfinished.
中途半端な知識で話すと恥をかくよ。
You'll embarrass yourself if you talk with half-baked knowledge.