をおかす

make (a mistake)

→ を
phrase Rare #34,897
make (a mistake) Typically used after words such as 過ち, ミス, and 誤り to mean making or committing a mistake. The same verb can also mean committing a crime, depending on the object.
JA: 私たちはしばしば誤りをおかす。
EN: We often make mistakes.

誤りをおかすことを恐れてはいけません

Don't be afraid to make mistakes.

あまり考えない者が多くの過ちをおかす

Those who don't think things through make many mistakes.

私たちはしばしば誤りをおかす

We often make mistakes.

彼は不注意な過ちをおかすしかも頻繁に

He makes careless mistakes, and often at that.