おそらく

• Reading: おそらく
• Romaji: osoraku
• Pronunciation: /o.so.ɾa.kɯ/

Meaning

Probably; most likely; in all likelihood; I suspect. Expresses a moderate level of confidence in a prediction.

An adverb expressing probability (roughly 70-80%). More formal and reserved than たぶん (tabun). Often used with だろう or と思う to soften predictions. Common in news reports, academic writing, and careful conversation. Carries a slight tone of caution.

Examples

1. おそらく明日の会議は中止になるでしょう。 Tomorrow's meeting will probably be canceled.
2. 彼はおそらくもう家に帰ったと思います。 I think he has most likely already gone home.
3. おそらくこの方法が一番いいでしょう。 This method is probably the best one.

Usage Guide

Context: news, academic, careful speech

Tone: cautious

Origin & History

Derived from the verb 恐る (osoru, to fear). The adverbial form originally meant fearfully or with trepidation, which softened over time to mean cautious conjecture — probably.

Cultural Context

Era: Ancient

Generation: All ages

Social background: Universal