What is a synonym for the word retroflex?

There isn't a single perfect synonym for "retroflex," as its meaning depends heavily on the context. Here are some possibilities, depending on what you want to express:

Phonetics:

* Turned back: This is the literal meaning, describing a sound produced by turning the tongue back towards the palate.

* Post-alveolar: This describes the place of articulation, meaning the tongue is behind the alveolar ridge.

* Retracted: This implies a movement backward, similar to "turned back."

Other:

* Curved: This is a general term, but could apply if describing something that is retroflexed.

* Bent back: Similar to "turned back" and "curved."

Example:

* "The sound of the letter 'r' in American English is retroflex."

* You could replace "retroflex" with "turned back," "post-alveolar," or "retracted" in this sentence.

Important Note: The best synonym depends on the specific context. Consider the intended meaning and audience when choosing a substitute.