onerous

US /ˈɑː.nɚ.əs/
UK /ˈɑː.nɚ.əs/
"onerous" picture
1.

oneroso, gravoso, pesado

involving a great deal of effort, trouble, or difficulty

:
The new regulations impose onerous burdens on small businesses.
Las nuevas regulaciones imponen cargas onerosas a las pequeñas empresas.
He found the task to be quite onerous.
Encontró la tarea bastante onerosa.