waists / wastes are similar-sounding terms with different meanings (referred to as homophones). To better understand the differences, see below for definitions, pronunciation guides, and example sentences using each term. 👇
waists: (noun) the narrowing of the body between the ribs and hips.
wastes: (noun) any materials unused and rejected as worthless or unwanted. (noun) useless or profitless activity; using or expending or consuming thoughtlessly or carelessly. (noun) (law) reduction in the value of an estate caused by act or neglect. (verb) spend thoughtlessly; throw away. (verb) use inefficiently or inappropriately. (verb) get rid of. (verb) run off as waste. (verb) cause to grow thin or weak. (verb) become physically weaker.
waists: w·EY·s·t·s
wastes: w·EY·s·t·s
(Examples are Wikipedia snippets under the CC ShareAlike 3.0 license. Definitions drawn from WordNet.)