Definition of costful in English:

costful

adjective

  • 1Expensive; sumptuous. Now rare.

  • 2Involving or characterized by expenditure or loss (of time, effort, etc.); costly. Now somewhat archaic.

Origin

Middle English; earliest use found in Ayenbite of Inwyt. From cost + -ful.

Pronunciation

costful

/ˈkɔːs(t)f(ʊ)l//ˈkɒs(t)f(ʊ)l/