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a. Rightmost Morpheme
The rightmost theory is one of the parts in morphology scope. It is termed the head of the compound. The function of the rightmost morpheme is to determine the
entire word O’ Grady, 1997: 146. The rightmost morpheme can also mention as the right- headed.  “Most  compounds  in  English  are  right- headed”  Napoli,  1996:
230.For example from the data is the word duck face, the meaning is not literary the duck’s  face,  from  the  right morpheme  which  is  face,  so  it  means  the  face  which  is
almost similar with duck by thrusting the lips.
b. Compounds and Compounding
The  writer  also  uses  the  compounds  and  compounding  theory.  Compounding theory  is  also  one  of  some  parts  that  is  learned  in  morphology.  The  meaning  of
compounding  itself  is  a  process  that  produces  new  words  by  forming  the  already existing  words  which  is  individual  word  Akmajian,  2001:  32.  For  example,  the
noun  ape can be  joined  with  the noun  man, so  that, it  forms the ape- man.  Another example  is  the  adjective  sick  can  be  joined  with  the  noun  room and  formed  the
sickroom.
c. Morphological Operation
“Traditional  grammarians  usually  distinguished  two  main  types  of morphological operation, inflection or inflexion and derivation” Spencer, 1991: 9.
There are some new entry words that having double morpheme, so that, this theory is needed  to  classify  whether  those  words  are  inflection  or  derivation.  Inflection  does
not  change the  syntactic  category of the  words,  while derivation causes  a change in
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syntactic  category  of  the  words  Spencer,  1991:  9,  for  example,  the  word  “cutter N”. The base of this word is cut V. Cut V + er cutter N. This is the example
of derivational word; it changes from cut V into cutter N. The inflectional word is “scientist N”. The base of this word is science N. Science N + ist scientist N.
It does not change the part of speech, so this is an inflectional word.
d. Tree Diagrams Theory
Based  on  Spencer’s  theory,  tree  diagrams  or  syntactic  structures  analyzes  the words that  are added  affixes  defines the category of the resulting word, and  for this
reason is regarded as the head of the word. This approach is also supposed to apply to inflected forms Spencer, 1994: 75.
e. Derivational and Inflectional Theory
Based  on  the  book  of  Mark  Aronoff  and  Kirsten  Fudeman,  the  inflectional morphology does not change the lexical category of the word. For example, the word
slurpV  which  means  eat  or  drink  noisily. If  it  is  written  in  simple  present  tense becomes slurps or simple past tense becomes slurped, it does not change the part of
speech,  it  is  still  a  verb.  While  the  derivational  morphology  changes  the  part  of speech. For example, the word glory N added by –ious becomes glorious Adj, the
part of speech changes.
2. Theory of Meaning
Based  on  the  Blackwell  dictionary  of  western  philosophy  that  is  edited  by Nicholas Bunnin and Jiyuan Yu, that
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“meaning  of  a  word  is the  object  it  denotes,  and  the  meaning  of  a  sentence  is the proposition it expresses. Every meaningful expression has meaning because
there  is  something  that  it  refers  to,  designates,  signifies,  or  denotes.  It  is  a symbol that stands for something other than itself. The theory is also called the
denotative  theory  of  meaning.  A  simple version  of  this  theory  claims  simply that the meaning of an expression  is that to which the expression refers. But a
sense-reference  distinction  shows  that  two  expressions  can have  different meaning  but  the  same  referent.  A  more  sophisticated  version  of  this  theory,
such  as  that  developed  by  Russell, claims  that  meaning  is  a  referring  or denoting relation between a term and the object it picks out. This theory is the
most influential one in the modern discussion of meaning and reference, but it has  been  challenged  because  of  its  theoretical requirement  that  there  is
something or other to which a word refers” Bunnin, 2004: 1.
It  means  that  every  meaning  is  referring  something. It  most  refers  to  the expression. The same word can have the different meaning, like mentioned that “two
expressions can have different meaning but the same referent”.For example, the word “book”, it can be a noun that the meaning is a written or printed work and it also can
be a verb and the meaning is reserve accommodation, a place, etc.; buy a ticket in advance.Therefore, it relates between the term and the object.
a. Endocentric and Exocentric Meaning
Compounds which have a head are called ‘endocentric compounds’. A head of a compound has similar characteristics to the head of a phrase: it usually has the same
word class.  For  example, in  sneak-thief,  thief is  the head  a sneak-thief  is  a  kind of thief. Both  sneak  and  thief  are  noun.  Compounds  without  a  head  are  called
‘exocentric  compounds’  or  The  difference between  endocentric  and  exocentric compounds is sometimes a matter of interpretation, and is often of little relevance; for
example,  whether  you  think  greenhouse  is  an  endocentric  or  exocentric  compound