useful

UK: ˈjuːs.fəl | US: ˈjuːs.fəl

Definition
  1. adj. serving a purpose or providing benefit

  2. adj. practical or functional in design

Structure
use <to employ>ful <full of>
Etymology

The word "useful" combines the root "use" (from Old French user, meaning "to employ") with the suffix "-ful" (from Old English -full, meaning "full of"). This structure literally means "full of use," reflecting its modern sense of being practical or beneficial. The suffix "-ful" is commonly added to nouns to form adjectives indicating abundance (e.g., "joyful," "careful").

Examples
  1. This tool is very useful for fixing small electronics.

  2. She gave me some useful advice about job interviews.

  3. The app provides useful features for travelers.

  4. Keeping a notebook is a useful habit for students.

  5. His experience made him a useful member of the team.