This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

adj. Weighing less than is normal, healthy, or required.

n. Insufficiency of weight.

adj. Of an inappropriately or unusually low weight.

adj. Not too heavy for an intended purpose.

adj. Being less invested in a particular area than market wisdom suggests.

n. The state or quality of being underweight.

v. To underestimate the weight of.

v. To give insufficient weight to (a consideration); to underestimate the importance of.

adj. being very thin

"Even more interestingly, it shows that being underweight is as much a danger to health as obesity, and that a few extra pounds in otherwise healthy adults seems to increase longevity."

lean    thin   

overweight   

shopaholic    undervaluation    underperformance    danam    underestimation