strident in WordNet English dictionary

1. conspicuously and offensively loud; given to vehement outcry
   "blatant radios"; "a clamorous uproar"; "strident demands"; "a vociferous mob"
   blatant  clamant  clamorous  strident  vociferous 
   
2. of speech sounds produced by forcing air through a constricted passage (as `f', `s', `z', or `th' in both `thin' and `then')
   fricative  continuant  sibilant  spirant  strident 
   
3. unpleasantly loud and harsh
   raucous  strident 
   
4. being sharply insistent on being heard
   "strident demands"; "shrill criticism"
   strident  shrill