Root structure within the Arabic dictionary

Abstract

In Arabic and other Semitic languages ; The linguistic data show that biconsonantal roots are not a hypothesis relating to a prehistoric period but constitute
an historical reality attested by a group of nouns and by a series of verbal forms;
this is further supported by the semantic concurrence of many roots in two of
their radicals. There is, however, a sufficient reason for maintaining, as some
have done, that the entire Semitic stock of roots was entirely biconsonantal. It is a
more likely supposition that originally there existed roots with either two or three
consonants and that at a certain stage in the development of the Semitic languages
the triconsonantal system prevailed extending by analogy and thus bringing into
line biconsonantal roots through the adoption of a third radical.