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.
1 They began the arduous climb, puffing in the high elevation for ten minutes until the trail leveled and opened to their left. 2  It is an arduous race, for only the fittest, yet the race is always booked early to its maximum. 3  He stopped to think, an arduous task.  It was an arduous trip.