useful
Definitions
Able to be used for a practical purpose or in several ways.
Helpful or advantageous in achieving a desired result.
Examples
A sharp knife is a very useful tool in the kitchen.
Learning a second language can be incredibly useful for your career.
This map will be useful when we go hiking in the mountains.
Synonyms
helpful beneficial advantageous practical valuable functional effective
Antonyms
useless worthless futile pointless ineffective unhelpful impractical