Most growling can be interpreted as being the most angry or agitated. Some possible antonyms for this phrase include the least growling, the calmest, the most peaceful, or the most serene. Rather than being angry and aggressive, someone who is the least growling may be considered to be timid or shy. Those who are the calmest are likely to be level-headed and composed, while those who are the most peaceful may be seen as gentle, loving and kind-hearted. The most serene individuals are those who are completely at peace with themselves, their surroundings and the world around them.