1to see through (a plot, lie, or pretence); to penetrate and discover the truth or someone's true intentions.
探偵は犯人の嘘をすぐに見破った。
The detective quickly saw through the culprit's lies.
彼女は彼の本当の気持ちを見破った。
She saw through his true feelings.
相手の策略を見破るには冷静な観察が必要だ。
To see through an opponent's scheme you need calm observation.