matter (EN)
noun, verb

noun “matter”

sg. matter, pl. matters or uncountable
  1. (in physics) anything that takes up space and has weight
    What is the difference between matter and energy?
  2. (in combination) a specific type of material
    The compost pile was full of organic matter from the kitchen scraps.
  3. a topic or issue that people think or talk about
    The meeting was called to discuss an urgent matter.
  4. (preceded by "the") a problem
    What's the matter with your car?
  5. (followed by "of") an approximate amount
    It's just a matter of weeks until the project is finished.

verb “matter”

matter; he matters; past mattered, part. mattered; ger. mattering
  1. to be important
    What really matters to her is spending time with family.