山やまをかける

expression, ichidan verb

speculate; make an educated guess; gamble on a prediction

Used when someone makes a calculated guess or takes a chance based on intuition or limited information, often in contexts like exam predictions, betting, or strategic decisions. Similar to 山を張る.

See also: 山を張る

• 試し験けんに出でそうな問もん題だいを山やまをかけて勉べん強きょうした。

  I studied by making an educated guess about which questions would appear on the exam.

• 彼かれは競けい馬ばで山やまをかけて大たい金きんを失うしなった。

  He gambled on a horse race and lost a lot of money.