'full-pitched' originates from the combination of 'full' and 'pitched', where 'full' meant 'complete' and 'pitched' referred to 'having a specific tone or sound'.

'full-pitched' evolved from the Middle English use of 'full' and 'pitched', which were used to describe sounds or tones that were complete or at their maximum intensity.

Initially, it meant 'having a complete tone', but over time it evolved into its current meaning of 'having a complete or maximum degree of pitch or intensity'.