一いっ知ち半はん解かい

na-adjective, noun

superficial knowledge; half knowledge

A yojijukugo describing shallow, incomplete understanding. Often used critically of someone who knows only a little but acts knowledgeable.

• 彼かれの説せつ明めいは一いっ知ち半はん解かいで、かえって混こん乱らんを招まねいた。

  His explanation was based on superficial knowledge and only caused more confusion.

• 一いっ知ち半はん解かいのまま人ひとに教おしえるのは危き険けんだ。

  It's dangerous to teach others with only half-baked knowledge.