The following words have inflectional affixes EXCEPT（ ）.

Words are arbitrary symbols with independent identities so far as their spelling and pronunciation is concerned. But （ ）, all words are related in one way or another.

“I'm sure that they will come today.”There are（ ）content words in the above sentence.

“Washing machine” is a word formed by（ ）.

The word “airmail” is（ ）motivated.

​​In modern times, （ ）is the most important way of vocabulary expansion.

The prefix “mis-” in the word “mistrust” is a （ ）prefix.

The plural morphme “-s” is realizd by/Iz/after the following sounds EXCEPT（ ）.

“TV” is a（n）（ ）.

One important criterion to tell the fundamental difference between homonyms and polysemants is to see their（ ）.