mouth morphemes
intense = ee
sluggish = tongue out
​casual, average = hmm
smooth, small= oo
full, thick = puffy

​Examples: Fire & Water 

Examples
The cooking fire is big. (ee) 
The food is messy. (tongue out) 
Fill the water in the tub to a normal level. (hmm) 
The breeze feels good. (oo)
A lot of smoke is coming from the refrigerator. (puffy)