tax·ing 
/ˈtæksɪŋ/ adjective
/ˈtæksɪŋ/ adjective [more taxing; most taxing] : requiring a lot of effort, energy, etc.
▪ a taxing job/chore ▪ The journey proved to be very taxing.
▪ a taxing job/chore ▪ The journey proved to be very taxing.
