手早い答え
conjetura は不完全な兆候からの推測、especulação は確認済みの範囲をより自由に越える憶測です。
確実な見分け方は、英語から訳す前に、その単語の働きを見きわめることです。
それぞれの単語の働き
conjetura
conjecture
Use conjetura for a reasoned possibility built from incomplete signs or evidence.
especulação
speculation
Use especulação for exploration beyond confirmed evidence, or financial trading based on expected price changes.
選び方
- conjetura: Choose conjetura if the sentence points to a reasoned possibility built from incomplete signs or evidence.
- especulação: Choose especulação if the sentence points to exploration beyond confirmed evidence, or financial trading based on expected price changes.
例文
A explicação ainda é uma conjetura.
The explanation is still a conjecture.
A notícia gerou especulação sobre a venda da empresa.
The news generated speculation about the sale of the company.
よくある落とし穴
Neither word means proven fact. Conjetura often sounds like one candidate explanation; especulação can name a wider cloud of possibilities.
文脈の中で練習する
自分の実生活から文を一つ選び、二回書いてみましょう。一度はconjeturaで、もう一度はespeculaçãoで。どちらも成り立ちそうなら、意味の違いを言葉にしてみましょう。