Most antifreeze solutions contain high levels of ethylene glycol, an ingredient that, once metabolized, is extremely toxic to dogs and cats. Pets are often attracted to the liquid because of its sweet taste. Even small amounts can be lethal to animals.
Wiktionary(0.00 / 0 votes)Rate this definition: arduous(Adjective) Needing or using up much energy; testing powers of endurance. The movement towards a peaceful settlement has been a long and arduous political struggle.
Example Sentences for arduous. There were at least two sergeants, he claimed furiously, whose turn it should have been to go on this arduous mission. The acquisition of these qualities is to man a most arduous task. To hunt them out of their native lairs and bind them to arduous and ignominious servitude was hardly to be thought of. Yet to enforce it was the most arduous task which Christianity ever had to perform.