difficult to accomplish; demanding considerable mental effort and skill; "the arduous work of preparing a dictionary"
characterized by toilsome effort to the point of exhaustion; especially physical effort; "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "set a punishing pace"
taxing to the utmost; testing powers of endurance; "his final, straining burst of speed"; "a strenuous task"; "your willingness after these six arduous days to remain here"- F.D.Roosevelt
United States astronomer who discovered that sunspots are associated with strong magnetic fields (1868-1938)
a soldier of the American Revolution who was hanged as a spy by the British; his last words were supposed to have been `I only regret that I have but one life to give for my country' (1755-1776)
exhibiting or restored to vigorous good health; "hale and hearty"; "whole in mind and body"; "a whole person again"
marked by courage and determination in the face of difficulties or danger; robust and uninhibited; "you have to admire her; it was a gutsy thing to do"; "the gutsy...intensity of her musical involvement"-Judith Crist; "a gutsy red wine"