History of the English language
Suppletion perhaps the most drastic form of
irregularity/iconicity), covers mainly the most frequent words
Metathesis-Two sounds, at least one of which is a consonant, change places inside a word.
When one of the sounds is a vowel,the other is usually /r/. Fyrst/first/frist a typical case of
metathesis.Another case in the passage: beorht/briht.Metathesis present in many languages,
a universal phenomenon. For Instance, Proto-Indo-European had tworoots *spek- and
the metathetical *skep-, both with the basic meaning of "look, observe, examine". The first
is behind Latin words that produced such English loans as spectacle, spectator, expect,
inspect, perspective, etc. The second is behind the Greek word for "examine" with the
derivatives sceptic, sceptical, scepticism (one who examines things inevitably becomes
sceptical about them!). Metathesis, essentially in the same sense, is also a term used in
psycholinguistics
annaabi.ee 
