useful

Definitions

use + -ful (full of) = 'full of use.' Something useful is, transparently, packed with usability — it serves a real purpose. Its opposite, useless, is 'empty of use.'

Common Collocations

• 1.useful information有用的信息
• 2.useful tip有用的提示
• 3.prove useful证明有用
• 4.come in useful派上用场
• 5.extremely useful极其有用

Example Sentences

• 1.

  This app is surprisingly useful for tracking daily expenses.

• 2.

  Thanks for the tip — that was really useful.

• 3.

  A good map is useful when you are exploring a new city.

Synonym Comparison