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underweight

underweight

8 3.1
Very thin and below a healthy weight for their age and height
  • adjective
  • /ˌʌndərˈweɪt/
translation icon : bajo peso
  • The doctor advised him to gain weight because he is underweight for his height.

She is very short and she is very underweight for her age.

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Examples

  • Based on BMI-weight status, 40.8% of the sample were underweight, 53.1% were normal weight, and 6.2% were overweight.

    Academic text (1997)
  • And in fact, those struggling with our fed are aware that they are often underweight and are actually concerned about that and actively trying to gain weight.

  • She is very short and she is very underweight for her age.

  • Gee, my gynecologist thought I was a little underweight, too.

  • He looks a little underweight.

  • If hunger is chronic, the baby will be underweight or failing to thrive.

    Academic text (2014)
  • In each case, Sharrer was instructed to reject men who were underweight or suffered from respiratory problems.

    Academic text (1991)
  • Many patients with COPD are either underweight or overweight, and this influences their prognosis.

    Academic text (2012)
  • Twenty-two percent of the male athletes placed themselves in the underweight category compared to 13% of the nonathletic males.

    Academic text (1991)
  • We found a close association between underweight and specific chronic conditions, including chronic pulmonary disease (COPD).

    Academic text (2018)

Synonyms

thin
vsunderweight
314 1.0

Having little body fat and a slim shape

is defined by weight below healthy norms rather than by natural build
skinny
vsunderweight
298 1.3

Very thin in a way that looks unhealthy

focuses on measured weight being below healthy norms rather than appearance
lean
vsunderweight
108 2.5

Thin with little extra fat or money

is a medical low weight state rather than a simple lack of fat
scrawny
vsunderweight
  • Informal
40 4.2

Very thin and weak in a way that looks unhealthy

is about being under healthy weight rather than mostly about looks
bony
vsunderweight
30 2.5

So thin that you can see the bones under the skin

is measured as weight below healthy levels rather than only skeletal look
emaciated
vsunderweight
8 7.8

Extremely thin from illness or lack of food with bones showing

is low body mass defined by being below healthy weight rather than cause
underfed
vsunderweight
3 3.4

Not having enough food to be healthy

describes weight below healthy norms irrespective of short term feeding levels
skinny as a rail
vsunderweight
  • Informal
1 7.0

Very thin person with little or no fat

is defined medically by weight below normal rather than only visual frailty
weedy
vsunderweight
1 5.4

Very thin and weak, with little muscle

emphasizes low measured weight relative to health rather than muscle loss alone
undernourished
vsunderweight
1 4.4

Not having enough food to stay healthy and grow

expresses low weight status regardless of whether nutrition is currently lacking
scraggy
vsunderweight
7.9

Very thin and bony in a way that looks unhealthy

is about weight being below normal for health rather than just gaunt looks
boney
vsunderweight
  • US
3.4

Thin so you can see or feel the bones

refers to overall low weight not just visible bones
thin-bodied
vsunderweight
4.5

An animal or object with a slim, narrow body

indicates being under healthy weight rather than merely having a slim shape
slim-bodied
vsunderweight
3.5

Having a thin, narrow body shape

is about being below normal healthy weight rather than graceful slimness
slender-bodied
vsunderweight
4.6

Having a long thin body

marks weight below healthy limits rather than an elegant body shape
unnourished
vsunderweight
7.5

Not having enough food or nutrients to grow and stay healthy

refers to low weight compared with healthy standards rather than only diet

Antonyms

146 2.2

Weighing more than is healthy for a person's height

How Thin

emaciated
8 7.8
underweight
8 3.1
thin
314 1.0
slender
57 1.4

Surface Forms

underweight positive
underweighter comparative
underweightest superlative

Morphology

underweight = weight (transparent) = under + weight

A direct, literal combination of 'under' + 'weight' meaning below the normal or healthy weight; a typical B1 learner who knows 'under' and 'weight' can infer this meaning.

Etymology

Underweight comes from the parts under- meaning 'below' and weight meaning 'how heavy' something is, so it paints a simple picture of being 'below' the normal weight. That's why an underweight person is thinner than the healthy amount.