1. Characterized by effort to the point of exhaustion; especially physical effort
   - arduous, backbreaking, grueling [US], gruelling [Brit, Cdn], hard, heavy, laborious, punishing, toilsome

See also: effortful, operoseness

• Oscar
• Oscar Fingal O'Flahertie Wills Wilde
• Oscar Hammerstein
• Oscar Hammerstein II
• Oscar Palmer Robertson
• Oscar Robertson
• Oscar Wilde
• oscheocele
• oscheocoele
• eye doctor
• eye dropper
• eye infection
• eye mask
• eye movement
• eye muscle
• Eye of Ra
• eye opener
• eye operation
• eye rhyme
• eye socket
• eye surgery
• eye-beaming
• eye-catcher
• eye-catching
• eye-deceiving