Translation guide
The English phrase "set free" means to release someone or something from confinement, captivity, or restriction. In Japanese, the best expression depends on what is being freed and the context. Common translations include 解放する (kaihō suru) for abstract or physical release, 放す (hanasu) for letting go of a physical hold, and 自由にする (jiyū ni suru) for giving freedom. For releasing animals, 放つ (hanatsu) or 逃がす (nigasu) are used. Note that literal translations can sound unnatural; choose based on the situation.
They set the prisoner free.
They set the animal free from the cage.
Often used for releasing animals into the wild or setting something free with a sense of letting it go. More literary or formal than 放す.
They set the bird free into the sky.
To let escape or set free, often used for animals or people you intentionally release. Implies allowing to flee.
I set the butterfly I caught free.
To make someone or something free; emphasizes granting freedom. Common in everyday speech.
Set him free.
To let go of something you are holding or to untie/unfasten.
To liberate someone from rules, duties, or social constraints.
To liberate someone's mind, heart, or soul.
放す (hanasu) is the most common for physically letting go of something held. 放つ (hanatsu) is more literary and often used for releasing animals into the wild or abstract things like light/smell. 解放する (kaihō suru) is for freeing from confinement or oppression, both physical and abstract.
Directly translating 'set free' as 自由に設定する (jiyū ni settei suru) is incorrect. Use the appropriate verb based on context.
He set his anger free.