FIML is an acronym that stands for Functional Interpersonal Meta Linguistics.
FIML is a form of analytical psychotherapy done between two people, neither of whom needs any formal training in psychotherapy. It is designed to optimize communication and psychological well-being.
FIML is a technique that uses real-time, real-world communication data to clear up mistaken psychological interpretations that may have been held for many years or that may have just arisen.
By clearing up many small mistaken interpretations between partners, FIML gradually clears up the psychological bases of those misinterpretations. In this way, FIML optimizes the communication and psychologies of both partners.
For a basic description of how to do FIML see: How to do FIML.
For more information about the theory and practice of FIML, please see other posts on this site, most of which are concerned with FIML in one way or another.
[Abundant FIML information can be found under the tags brain science, and Functional Interpersonal Meta Linguistics accessible on the sidebar. ABN]
A way to visualize the value of FIML practice

FIML practice is like the JWST telescope compared to normal interpersonal speech, which is like Hale telescope at best.
FIML is a technical advance in listening and speaking which allows for much greater clarity and resolution.
In Buddhist terms, FIML is partner-based mindfulness that provides immediate objective control on real-time meaning and mutual understanding. ABN