Lexis meaning ‘word, phrase’ (hence lexicos ‘having to do with words’) and logos

use [z] – use [s]
In such cases we say that the phonemic shapes of the word stand in complementary distribution or in alternation with each other. All the representations of the given morpheme that manifest alteration are called allomorphs of that morpheme or morpheme variants.
Types of meaning of morphemes:

1. 
   lexical meaning (roots, affixes)
   

Affixes: connotations (positive or negative)
Ex. spiderish hands (ish – negative)
wolfish smile
pig – piglet (diminutive)

2. 
   part-of-speech meaning (not roots, only affixes)
   

Ex. owner
Speaker

3. 
   distributional meaning (order of morphemes)
   

Ex. house-boat - плавучий дом
boat-house - навес, сарай для лодок
flower wall – цветочная стена
wall flower – 1)желтофиоль (садовая)2) шутл. дама, оставшаяся без кавалера (застенчивая или не пользующаяся успехом девушка, которая на танцах стоит у стены, наблюдая за танцующими)

4. 
   Differential meaning (to distinguish one word from another)
   

Ex. redo – переделать
overdo – сверх, делать что-л. слишком усердно
Types of segmentability:

1. 
   complete segmentability – you can easily split a word.
   

Ex. conversationalist
nature
native

2. 
   conditional – semantically is not possible
   

Ex. re-ceive
de-ceive
ceive looks like a root, but it is not a root, segmentation is doubtful
ceive is pseudo morphene

3. 
   defective segmentation – components never occur in other words or very seldom
   

Ex. en-hance
hance is a unique morpheme
ham-let
di-smay
straw-berry
cran-berry
rasp-berry