Translation guide
How to express that an action or state occurs without the subject being aware of it, or that something happens inadvertently.
The subject does something or something happens without the subject's conscious awareness.
Adverb meaning 'unintentionally' or 'without thinking', used when you do something by accident or out of habit.
つい食べ過ぎてしまった。
I ended up eating too much without noticing.
I accidentally told the secret without realizing.
Literally 'while not knowing', used for gradual, unconscious changes or actions.
Time passed without my noticing.
I had picked up a bad habit without noticing.
Directly 'while not noticing', often used for things that happen before you realize.
I dropped my wallet without noticing.
'Before I knew it' or 'without my noticing', for things that happen subtly over time.
The rain had stopped without my noticing.
An action is performed stealthily or goes undetected by other people.
Passive-negative form of 気づく, meaning 'without being noticed'.
He left the room without being noticed.
Casual, from ばれる (to be found out). 'Without getting caught'.
I was able to cheat without being noticed.
Adverb meaning 'secretly' or 'stealthily', often used for doing something without others noticing.
Failing to notice a detail, mistake, or change.
Verb meaning 'to overlook' or 'to miss seeing'.
I overlooked the mistake without noticing.
Pattern: 'do something without noticing'. Attach verb stem or noun.
I kept talking without noticing his change.
つい implies doing something you know you shouldn't but can't resist, while うっかり implies carelessness or absent-mindedness. うっかり is closer to 'without noticing' in the sense of a slip-up.
I carelessly forgot the appointment without noticing.
Avoid directly translating 'without noticing' as 気づかないで or 気づかなくて, as these often sound unnatural. Use the patterns above instead.
こっそり抜け出した。
I slipped away without anyone noticing.