waste away
[verb]
Synonyms: fail, dwindle, fall short, shrink, wane, weaken

[TahlilGaran] English Synonym Dictionary ▲

waste away phrasal verb (see also waste)
to gradually become thinner and weaker, usually because you are ill

[TahlilGaran] Dictionary of Contemporary English ▲

waste away
1.
to gradually become thin and weak.
He stopped eating and wasted away until he looked like a shadow.

2.
to be damaged or rubbed away by weather.
Good soil can waste away quickly if it's not cared for properly.

[TahlilGaran] English Idioms Dictionary ▲

waste away
v. To become more thin and weak every day.
Jane is wasting away with tuberculosis.
After Mrs. Barnes died, her husband wasted away with grief.

[TahlilGaran] English Idioms Dictionary ▲