خواص التطور الصوتي والعوامل الموثرة فيه

The sound has many characteristics, it moves slowly and gradually, so the difference of sounds in a generation from what it was in the generation immediately preceding it is hardly discernible only by those who are firm in observing these matters, but it appears in a clear picture if we balance between their two states in two generations separated by hundreds of years, our language hardly differs In its sounds from the language of our immediate fathers, but it differs markedly in this respect from what it was in the tongues of our ancestors in the Middle Ages or in modern times.