Such words as 'goody-goody' and 'to pooh-pooh' have become accepted as part of our normal vocabulary, but the method of duplication may on occasion be used more freely [...]
- Sapir (1921), a pag.76

As soon as we test our vocabulary, we discover that the parts of speech are far from corresponding to so simple an analysis of reality.
- Sapir (1921), a pag.116

Every language can and must express the fundamental syntactic relations even though there is not a single affix to be found in its vocabulary.
- Sapir (1921), a pag.124

The actual size of a vocabulary at a given time is not a thing of real interest to the linguist, as all languages have the resources at their disposal for the creation of new words, should need for them arise.
- Sapir (1921), a pag.124

The individual variations are swamped in or absorbed by certain major agreements- say of pronunciation and vocabulary- which stand out very strongly when the language of the group as a whole is contrasted with that of the other group.
- Sapir (1921), a pag.174

Languages can change at so many points of phonetics, morphology, and vocabulary that it is not surprising that once the linguistic community is broken it should slip off in different directions.
- Sapir (1921), a pag.152

[...] our vocabulary is rich in near-synonyms and in groups of words that are psychologically near relatives, but these near-synonyms and these groups do not hang together by reason of etymology.
- Sapir (1921), a pag.170

In phonetics, as in vocabulary, we must be careful not to exaggerate the importance of interlinguistic influences.
- Sapir (1921), a pag.201