ABSTRACT
Morphology is the study of the structure of words, which are regarded as free morphemes or combinations of morphemes. Morphology comprehends two main areas of study:
1 inflection, which is concerned with the various forms in which a word may exist:
cat cats do does did doing done early earlier earliest
2 word formation:
amazingly<amaze+ing+ly bookcase<book+case brunch<breakfast+lunch globetrot<globetrotter kleenex<clean+X
See: affix, derivation, word formation.