not easily borne; wearing; "the burdensome task of preparing the income tax return"; "my duties weren't onerous; I only had to greet the guests"; "a taxing schedule"
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
the metabolic processes whereby certain organisms obtain energy from organic molecules; processes that take place in the cells and tissues during which energy is released and carbon dioxide is produced and absorbed by the blood to be transported to the lungs
a single complete act of breathing in and out; "thirty respirations per minute"
respirator that produces alternations in air pressure in a chamber surrounding a patient's chest to force air into and out of the lungs thus providing artificial respiration
having existence or being or actuality; "an attempt to refine the existent machinery to make it more efficient"; "much of the beluga caviar existing in the world is found in the Soviet Union and Iran"
a fertilizer that is derived from animal or vegetable matter
involving or affecting physiology or bodily organs; "an organic disease"
simple and healthful and close to nature; "an organic lifestyle"
relating or belonging to the class of chemical compounds having a carbon basis; "hydrocarbons are organic compounds"
being or relating to or derived from or having properties characteristic of living organisms; "organic life"; "organic growth"; "organic remains found in rock"
of or relating to foodstuff grown or raised without synthetic fertilizers or pesticides or hormones; "organic eggs"; "organic vegetables"; "organic chicken"
of or relating to or derived from living organisms; "organic soil"
backache affecting the lumbar region or lower back; can be caused by muscle strain or arthritis or vascular insufficiency or a ruptured intervertebral disc
sudden expulsion of air from the lungs that clears the air passages; a common symptom of upper respiratory infection or bronchitis or pneumonia or tuberculosis
exhale abruptly, as when one has a chest cold or congestion; "The smoker coughs all day"