costless

/ˈkɔstləs/
adjective
  1. Free of charge; requiring no payment.
    • Many online courses provide costless access to their basic materials.
    • The costless samples at the grocery store attracted a crowd of shoppers.
    • The museum offers costless admission on the first Sunday of every month.
What does "costless" mean? | whatsthatwordmean | whatsthatwordmean