as·​sib·​i·​late | \əˈsibəˌlāt, aˈ-, usually -āt + V\

Definition of assibilate 

transitive verb

1 : to introduce a sibilant sound after or less often before z was an assibilated d in primitive Greek—either \dz\ or \zd\

2 : to convert to or replace by a sibilant sound or a sound of which a sibilant is one constituent (as when the pronunciation \ˈindyən\ for Indian becomes \ˈinjən\; \j\ = \d\ + \zh\)

intransitive verb

: to change by introducing a sibilant sound (noninitial) Indo-European ti (unless preceded by s) assibilates (through palatalization) to si— G. U. Bonfante

Love words?

You must — there are over 200,000 words in our free online dictionary, but you are looking for one that’s only in the Merriam-Webster Unabridged Dictionary.

Start your free trial today and get unlimited access to America's largest dictionary, with:

  • More than 250,000 words that aren't in our free dictionary
  • Expanded definitions, etymologies, and usage notes
  • Advanced search features
  • Ad free!

History and Etymology for assibilate

ad- + sibilate

Keep scrolling for more

Learn More about assibilate

Share assibilate

Statistics for assibilate

Look-up Popularity

Comments on assibilate

What made you want to look up assibilate? Please tell us where you read or heard it (including the quote, if possible).


a knickknack or trinket

Get Word of the Day daily email!

Test Your Vocabulary

Find the Cousins

  • a-large-tree-with-many-branches
  • Which pair shares a common word ancestor?
Spell It

Can you spell these 10 commonly misspelled words?


Test Your Knowledge - and learn some interesting things along the way.


Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!