Does your child or you as an adult say ‘wabbit’ instead of ‘rabbit’, 'callut' instead of 'carrot'? This speech pattern is known as rhotacism , a common articulation disorder involving difficulty with pronouncing the ‘R’ sound. Rhotacism can be developmental but often persists without the right guidance. 'R' is one of the common tricky sounds to master. What Is the R Sound? And Why Is It So Hard to Say? The “R” sound  may seem simple, but from a speech development perspective