Arduously

requiring great exertion; laborious; difficult:
an arduous undertaking.
requiring or using much energy and vigor; strenuous:
making an arduous effort.
hard to climb; steep:
an arduous path up the hill.
hard to endure; full of hardships; severe:
an arduous winter.
historical examples

it was as if every morning that ship had been arduously explored with—with toothbrushes.
falk joseph conrad

she studied music, arduously playing accompaniments for her mother.
melomaniacs james huneker

in the conventional significance of the word her life was hardly toilsome, but it was none the less most arduously occupied.
thirty howard vincent o’brien

“you have been working most arduously, senor carson,” said quesada.
the wolf cub patrick casey

gifted with a naturally fine organ, he has cultivated it arduously and to excellent purpose.
vocal mastery harriette brower

bill was arduously cooking his dinner, bending over the fire, and toiling like a blacksmith.
the open boat and other stories stephen crane

for where joy reigns on every side, to hunt for it arduously, or amidst pomp and circ-mstances, is to lose it.
my reminiscences rabindranath tagore

as he saw it, society would grow better only through the painfully slow and arduously painful processes of evolution.
the night-born jack london

arduously, but without avail, she searched through all the drawers and cupboards of the rattle-pane kitchen.
peace on earth, good-will to dogs eleanor hallowell abbott

the reputation we have been building up so arduously for years has been swept away in two short hours.
following the color line ray stannard baker

adjective
requiring great physical or mental effort; difficult to accomplish; strenuous
hard to endure; harsh: arduous conditions
hard to overcome or surmount; steep or difficult: an arduous track
adj.

1530s, “hard to accomplish, difficult to do,” from latin arduus “high, steep,” also figuratively, “difficult,” from pie root -eredh- “to grow, high” (see ortho-). literal sense of “high, steep, difficult to climb,” attested in english from 1709.