Translation guide
To reach a conclusion by reasoning from known facts or evidence. In Japanese, this is commonly expressed with verbs like 推測する (to infer), 推論する (to reason), or 判断する (to judge). The choice depends on formality and the nature of the reasoning.
To form an opinion or conclusion based on available information or clues.
The most common and neutral way to say 'deduce' or 'infer'. Used in both spoken and written contexts.
I deduced from his expression that something had happened.
To sense or infer something intuitively, often based on subtle cues or empathy. Common in everyday conversation.
I quickly deduced that she was busy.
To guess or conjecture, often with a nuance of estimating someone's feelings or situation. Slightly literary.
It's difficult to deduce what's on his mind.
To arrive at a conclusion through logical reasoning or deduction.
To reach a decision or judgment after thinking about known facts.
To deduce or work out something in a casual, everyday manner.
推測する is a general term for inferring or guessing based on evidence, while 推論する is more formal and implies a logical reasoning process. Use 推測する in daily conversation and 推論する in academic or technical writing.
There is no single Japanese verb that covers all uses of 'deduce'. Often, a more specific verb like 判断する or 察する is more natural. Using 推測する in every case can sound stiff or overly formal.
Deduce specific facts from general principles.
To draw a conclusion. Emphasizes the final step of reasoning.
I deduced from the evidence that he was the culprit.
Listening to him, I deduced he was lying.