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Yomi
やまをはる
Rōmaji
yama o haru
Type
idiom
Meaning
to make a guess
Additional Info
It is particularly used when you guestimate the questions/topics you will be asked in an exam (and focus on studying them only while ignoring the other subjects)
Synonym
予想する
Example
明日 (あした) 日本語の試験(しけん)だけど、時間(じかん)がないからヤマを張って敬語(けいご)だけ勉強 (べんきょう)しよう。
I have a Japanese exam tomorrow, but I don’t have much time left so I’ll guestimate the questions and focus on studying keigo only.