Translation guide
This guide covers how to express that something happened without someone knowing or being aware of it. Japanese uses various adverbs, phrases, and sentence patterns to convey this idea, often depending on whether the lack of knowledge is intentional or accidental.
To say that an action or event occurred without the person realizing it at the time.
A very common and natural way to say 'without one's knowledge' or 'before one knows it'. It implies the person was unaware while something was happening.
It had started raining without my knowledge.
His name had been removed from the list without his knowledge.
Similar to 知らないうちに, but emphasizes not noticing or realizing. Often used for gradual changes.
It had gotten dark without my noticing.
Means 'before one knows it' or 'without one's knowledge'. Often used for things that happen subtly or unexpectedly.
She had left the room without my knowledge.
Means 'secretly' or 'without someone's knowledge', often implying intentional concealment.
He prepared the party without her knowledge.
To indicate that something was done without asking or informing the person, often with a nuance of secrecy or behind one's back.
Literally 'silently', but used to mean 'without telling' or 'without permission'. Implies doing something without informing the person.
He sold the car without my knowledge.
Means 'without permission' or 'on one's own authority'. Often carries a negative nuance of doing as one pleases without regard for others.
An adverb meaning 'secretly' or 'stealthily', emphasizing the act of doing something without being noticed.
A more formal or literary way to express that something happened without someone's knowledge, often used in writing.
Both mean 'without one's knowledge', but 知らないうちに focuses on lack of knowledge, while 気づかないうちに emphasizes lack of noticing. They are often interchangeable, but 気づかないうちに is better for gradual changes.
My wallet was gone without my knowledge.
Spring had come without my noticing.
Do not directly translate 'without one's knowledge' as 知識なしで or 知らずに. These can sound unnatural or have different nuances. Use the phrases listed above instead.
彼は勝手に私のパソコンを使った。
He used my computer without my knowledge.
彼女はこっそり部屋を抜け出した。
She slipped out of the room without anyone's knowledge.
He continued his efforts without anyone's knowledge.