Adjective:

1. being very thin;

   "a child with skinny freckled legs"
   "a long scrawny neck"
   

skinnyadj.皮的；皮包骨头的；很瘦的n.<俚>内部消息

scrawnyadj.瘦的；骨瘦如柴的

underfedadj.没吃饱的；未喂饱的；营养不良的动词underfeed的过去式和过去分词.

malnourishedadj.营养不良的动词malnourish的过去式和过去分词.

emaciatedadj.瘦弱的；憔悴的动词emaciate的过去式和过去分词.

boneyadj.多骨的；瘦骨嶙峋的=bony.

scraggyadj.凹凸不平的；参差不齐的；骨瘦如柴的

weedyadj.尽是杂草的；似杂草的；瘦弱的

overweightadj.超重的；过胖的n.超重vt.使超重；过于重视

1. The doctor says I'm underweight.
   医生说我的体重低於标准。
2. The baby was dangerously underweight at birth.
   这婴儿出生时体重严重不足。

1. Underweight was not linked with cancer or CVD mortality.
   体重过轻与癌症或心血管病死亡率无关。