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.
Rescue work can be arduous. You might have to abseil down a cliff to rescue a sheep, or row out into a lake to free a swan entangled in a fishing line, which takes some doing. The work gets dirty and can involve dangers - such as climbing a cliff or retrieving animals from trees and floods.