The word or phrase to search for in the lexicons.

This parameter refines the search based on the lookup_ref.

This parameter refines the search to limit lookup to the actual input string.

This parameter refines the search to look for substring matches regardless of results for original input. One can pass the values 0 (to indicate false) or 1 (to indicate true).

If this is 1, the given word will be searched for with and without its vowels. If 0, then the word will be searched for exactly as written in the request