strenuous in Czech
strenuous in Czech
energický
Having great vigour or energy; forceful.
úporný
Having great vigour or energy; forceful.
namáhavý
(of a task) Requiring great exertion; very laborious.
náročný
(of a task) Requiring great exertion; very laborious.
usilovný
(of a task) Requiring great exertion; very laborious.
vysilující
(of a task) Requiring great exertion; very laborious.
vyčerpávající
(of a task) Requiring great exertion; very laborious.