Owing to the imperfection of the Hebrew alphabet, which, like that of most Semitic languages, has no means of expressing vowel-sounds, it is only partly possible to trace the development of the language.
Rawlinson, and independently of him, the ancient Persian vowel system.
The invention of vowel-signs of diacritic points to distinguish similarly formed consonants, and of other orthographic signs, soon put a stop to arbitrary conjectures on the part of the readers.
Properly triliterals, but, with the 2nd or 3rd radical alike, these coalesced in many forms where no vowel intervened, and gave the word the appearance of a biliteraL
Originally Siamese was purely monosyllabic, that is, each true word consisted of a single vowel sound preceded by, or followed by, a consonant.