1. Disappointingly unsuccessful
   "many frustrated poets end as pipe-smoking teachers";
   - defeated, disappointed, discomfited, foiled, thwarted, crushed, gutted [Brit, informal]

1. Hinder or prevent (the efforts, plans, or desires) of
   "What ultimately frustrated every challenger was Ruth's amazing September surge";
   - thwart, queer [informal], spoil, scotch, foil, cross, baffle, bilk [informal], scupper [informal]
    
2. Deprive of courage or hope; take away hope from; cause to feel discouraged
   "The setbacks frustrated his attempts to succeed";
   - discourage
    
3. Harass persistently in cruel or annoying way
   "The children frustrated the stuttering teacher";
   - torment, rag, bedevil, crucify, dun

See also: unsuccessful

Type of: alter, beset, change, chevvy [non-standard], chevy [Brit, archaic], chivvy [Brit], chivy [Brit], forbid, foreclose, forestall, harass, harry, hassle [informal], modify, molest, plague, preclude, prevent, provoke

Encyclopedia: Frustrated