An etymology is the history of a linguistic form, such as a word; the same
term is also used for the study of word histories. A dictionary etymology tells us what  is  known  of  an  English  word  before  it  became  the  word  entered  in  that
dictionary. If the word was created in English, the etymology shows, to whatever extent  is  not  already  obvious  from  the  shape  of  the  word,  what  materials  were
used to form it. If the word was borrowed into English, the etymology traces the borrowing process backward from the point at which the word entered English to
the earliest records of the ancestral language. Where it is relevant, an etymology notes  words  from  other  languages  that  are  related  to  the  word  in  the  dictionary
entry, but that are not in the direct line of borrowing.
4. Theory of Distinctive Feature
Based  on  Fromkin  in  the  book  An  Introduction  to  Language,  distinctive feature  organizes  language  by  defining  groups  of  sounds  which  may  exhibit
similar sound patterns. When  a  feature  distinguishes  one  phoneme  from  another  it  is  a
distinctive feature or phonemic feature. When two words are exactly alike  phonetically  except  for  one  feature,  the  phonetic  difference  is
distinctive,  since  this  difference  alone  accounts  for  the  contrast  or difference in meaning 1996: 256.
Usually  a  single  feature  has  two  values,  plus  +,  which  means  its presence, and minus -, which means its absence. E.g. p is [-voiced] and b is
[+voiced], and if we want to call this feature „voiceless‟ we can specify b as [-
voiceless] and p as [+voiceless]. The presence or absence of nasality also can be designated as [+nasal] or [-nasal].
This is a more explicit description of p, b, and m:
p             b           m Stop             +             +            +
Labial +
+            + Voiced
- +            +
Nasal             -              -            +
The distinctive features of the voiced stops are shown in the following table:
b m
d n
g ŋ
Stop +
+ +
+ +
+ Voiced
+ +
+ +
+ +
Labial -
+ -
- -
- Alveolar
- -
+ +
- -
Velar -
- -
- +
+ Nasal
- -
- +
- -
According  to  Crystal  1994,  p.162  in  the  book  The  Cambridge Encyclopedia  of  Language
,  distinctive  features  are  the  important  point  when analyzing phonology. It is because they reveal more about the way in which the
sounds  of  a  language  are  organized,  and  more  readily  permit  generalized
statements  within  and  between  languages,  than  do  descriptions  based  on phonemes and allophones.
5. Theory of Syllable Structure
The  syllable  is  a  basic  unit  of  speech  studied  on  both  the  phonetic  and phonological levels of analysis. No matter how easy it can be for people and even
for  children  to  count  the  number  of  syllables  in  a  sequence  in  their  native language, still there are no universally agreed upon phonetic definitions of what a
syllable  is.
Based  on  Crystal  in  the  book  The  Cambridge  Encyclopedia  of  The English Language
2003, Vowels and consonants typically do not act alone, the vast majority
of  English  words  contain  a  combination  of  vowels  V  and consonants  C,  such  as    CV  go,  VC  up,  CVC  cat,  CCVC
stops, and CCCV screw. 2003: 246
The syllable, usually marked as small Greek sigma: σ, has two immediate constituents it is divided into two elements, to put it in another way,  the Onset
O,  which  includes  any  consonants  that  precede  the  nuclear  element  the vowel, and the Rhyme R, which subsumes the nuclear element the vowel as
well as any marginal elements consonants that might follow it. The Rhyme, in turn, is divided into Peak P, also known as Nucleus N,
and  Coda  C.  The  Peak  Nucleus represents  the  “nuclear”  or  most  sonorous
element in a syllable. The Coda includes all consonants that follow the Peak in a
syllable. Syllable structure may be represented graphically by means of a “tree diagram”. The example the writer shall take is run rʌ n.
r
Ʌ
n Run
Onset                                                          Rhyme
r                                                  Nucleus Peak  Coda
Ʌ
n
From the example above, run r ʌ n, the Onset, Nucleus Peak and
Coda each consist of one segment: the consonant C r occupies the Onset, the  vowel  V
ʌ   is  the  Peak,  and  the  consonant  n  is  the  Coda  of  this syllable.
A  syllable  is  a  phonological  unit  which  is  formed  of  one  or  more phonemes. According to the book An Introduction to Language 1996,
Every  syllable  has  a  nucleus,  usually  a  vowel  but  it  may  be  a syllabic  liquid  or  nasal.  The  nucleus  may  be  preceded  by  one  or
more  phonemes  called  the  syllable  onset,  and  followed  by  one  or more segments called the coda. The nucleus and coda constitute the
subsyllabic unit called a rhyme.
The same explanation is explained by Asher in the book Encyclopedia of
Language and Linguistics p.3131, 1994, he said that the central position of the
syllable,  occupied  by  the  V  elements,  is  normally  referred  to  as  the  „peak‟