手早い答え
taxa は率・手数料、tarifa はサービスに設定された料金です。
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
taxa
rate or fee
Use taxa for a percentage, measured rate, or charge connected to a service or public act.
tarifa
service fare or tariff
Use tarifa for the set price charged for transport, utilities, or another priced service.
選び方
- taxa: Choose taxa if the sentence points to a percentage, measured rate, or charge connected to a service or public act.
- tarifa: Choose tarifa if the sentence points to the set price charged for transport, utilities, or another priced service.
例文
A taxa de juros caiu neste mês.
The interest rate fell this month.
A tarifa de ônibus aumentou.
The bus fare increased.
よくある落とし穴
Official charges follow legal definitions, so do not freely rename a tarifa as taxa in contracts, taxes, or public notices.
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taxaで、もう一度はtarifa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。