ロバの橋はし

noun

pons asinorum; donkey bridge; learning hurdle

A metaphor for a difficult obstacle in learning, especially a concept that blocks progress until it is understood. The term comes from the Latin 'pons asinorum' (bridge of donkeys), originally referring to a geometry theorem. In Japanese, it is a direct translation used in educational or philosophical contexts.

• この定てい理りは多おおくの学がく生せいにとってロバの橋はしだ。

  This theorem is a pons asinorum for many students.

• ロバの橋はしを越こえれば、その先さきの学がく習しゅうが楽らくになる。

  Once you get past the donkey bridge, the rest of the learning becomes easier.