1. Spend thoughtlessly; throw away
   "He wasted his inheritance on his insincere friends";
   - blow [informal], squander
    
2. Use inefficiently or inappropriately
   "waste heat"; "waste a joke on an unappreciative audience"
    
3. Spend extravagantly
   "waste not, want not";
   - consume, squander, ware [archaic]
    
4. Deliberately discard or dispose of
   "We waste the dirty water by channeling it into the sewer"; "The factory wasted the damaged stock"
    
5. Run off as waste
   "The water wastes back into the ocean";
   - run off
    
6. Cause extensive destruction or ruin utterly
   "The enemy lay waste to the countryside after the invasion";
   - lay waste to, devastate, desolate, ravage, lay waste
    
7. Lose vigour, health, or flesh, as through grief
   "She wasted away after the loss of her spouse";
   - pine away, languish [archaic]
    
8. Cause to grow thin or weak
   "The treatment wasted him";
   - emaciate, macerate
    
9. Become physically weaker
   "Political prisoners are wasting away in many prisons all over the world";
   - rot
    
10. [informal] Get rid of (someone who may be a threat) by killing
    "the double agent was wasted";
    - neutralize, neutralise [Brit], liquidate, knock off [informal], do in [informal], clip [informal], whack [informal], take out [informal]

1. Any materials unused and rejected as worthless or unwanted
   "they collect the waste once a week"; "much of the waste material is carried off in the sewers"; "they collect the waste matter once a week";
   - waste material, waste matter, waste product
    
2. Useless or profitless activity; using or expending or consuming thoughtlessly or carelessly
   "if the effort brings no compensating gain, it is a waste";
   - wastefulness, dissipation
    
3. The trait of wasting resources
   "a life characterized by thriftlessness and waste";
   - thriftlessness, wastefulness
    
4. An uninhabited wilderness that is worthless for cultivation
   "the trackless wastes of the desert";
   - barren, wasteland
    
5. (law) reduction in the value of an estate caused by act or neglect
   "The tenant's failure to maintain the property resulted in permissive waste";
   - permissive waste

1. Located in a dismal or remote area; desolate
   "waste places";
   - godforsaken, wild
    
2. (of material etc) not needed, unwanted or worthless, for disposal; produced as an unwanted byproduct
   "The waste gas disposal system should be connected"

Sounds like:

Derived forms: wasting, wastes, wasted

See also: bump off [informal], croak [informal], despatch [Brit], dispatch, inhospitable, murder, off [N. Amer, informal], polish off [informal], slay [literary]

Type of: act, activity, apply, cast aside, cast away, cast out, chuck out, consume, course, debilitate, deed, degenerate, deplete, destroy, deteriorate, devolve, discard, dispose, drain, drop, eat, eat up, employ, enfeeble, exhaust, expend, feed, fling, flow, human action, human activity, improvidence, kill, material, put away, ruin, run, run through, shortsightedness, spend, stuff, throw away, throw out, toss, toss away, toss out, use, use up, utilise [Brit], utilize, weaken, wild, wilderness, wipe out

Encyclopedia: Waste, radioactive