1.
uncertain; unreliable; indefinite
Not definite or reliable; lacking certainty. Used for situations, information, or outcomes that cannot be predicted or depended upon with confidence.
Usage
Used as a na-adjective (不確実な) and as a noun (不確実性 — uncertainty). Common in business, economics, and academic writing.
Common collocations
- 不確実性 (uncertainty)
- 不確実な情報 (unreliable information)
- 不確実な時代 (uncertain times)
- 不確実要素 (element of uncertainty)
Similar words
不確か is a more everyday word for "uncertain" or "vague," while 不確実 is more formal and analytical.