sound shift 
noun Linguistics
A systematic change in the pronunciation of a set of speech sounds as a language evolves.Such sound shifts in comparative linguistics parallel, almost uncannily, the slow march of genetic mutations as offspring populations gradually separate from a parent stock....
- Philologists have referred to them as P-Celtic in contrast to Goidelic as Q-Celtic, on the basis of a sound shift of q to p which split an earlier tongue known as Common Celtic.
- Crimean Gothic had undergone the same ‘jj’ to- ‘d' sound shift attested by many Visigothic words.
- mother's daughter
- Mother's Day
- mother's help
- mother ship
- Mother Shipton
- mothersick
- mothersickness
- mother's knee
- mother's little helper
- mothers' meeting
- mother's meeting
- mother's milk
- mother's pet
- mother's ruin
- mother's side
- mother's son
- mother-substitute
- Mothers' Union
- Mother's Union
- Mother Superior
- mother surrogate
- mother-symbol
- mother tincture
- mother-to-be
- mother tongue