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

noun. Insufficiency of weight.

adjective. Of an inappropriately or unusually low weight.

adjective. Not too heavy for an intended purpose.

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

noun. The state or quality of being underweight.

verb. To underestimate the weight of.

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

adjective. being very thin

"Regular readers of this blog will have noted previous entries on the “paradoxical” reverse epidemiology of obesity and cardiovascular mortality, where risk is apparently higher in underweight compared to normal weight, overweight or even mildly obese individuals (for e.g. of previous blog entries on this click here, here or here)."

overweight  

lean  thin  

'white  Allin  Asti  agre  at  

avoirdupois  bantamweight  beef  beefiness  boniness