strident
Pronunciation: /ˈstrʌɪd(ə)nt/
adjective
- 1(of a sound) loud and harsh; grating: his voice had become increasingly strident
- Phoneticsanother term for sibilant.

Origin:
mid 17th century: from Latin strident- 'creaking', from the verb stridere

Spelling help
Remember that strident ends with -ent.