Part 1 ran from the definition of language to the “sound pattern.” Part 2 is form — how a word is built, what kinds of meaning it hides, and why the attempt to rank languages fails. Chapters 4–6.

1. “Method” and “meaning” are separate

function (meaning) method (form) past plural suffix (work-ed, book-s) vowel change (sing/sang, goose/geese) One function spreads over several methods; one method carries several functions.
In English, both "past" and "plural" are expressed by a suffix and by vowel change. Method and function are not one-to-one. Diagram: L/LAB

Chapter 4. English plural can be -s (books) or vowel change (geese). Vowel change also carries past (sing → sang). Past can be a suffix (work-ed) or vowel change. In Hebrew, a verb’s meaning rides on three consonants (sh-m-r = “guard”) while the vowels between them shift the form.

Sapir’s conclusion is always the same: “Pattern is one thing, the utilization of pattern quite another.” Which function is expressed by which method is largely arbitrary, language by language; there is no logical necessity in it.

2. Six ways to build a word

1. word order the dog bites / bites the dog 2. composition fire + engine → fire-engine 3. affixation un- / -ing / -ed (pre-, suf-, in-) 4. internal change sing → sang, foot → feet 5. reduplication (repeat the stem; often plural) 6. accent récord (n.) / recórd (v.) Every language uses some of 1–6, from the very common (affixes) to the rare (functional accent, consonant change).
The gist of chapter 4: word order, composition, affixation, internal change, reduplication, accent — the ways a grammatical meaning is carried. Diagram: L/LAB

The methods themselves are not many: word order, composition, affixation (prefix, suffix, infix), internal modification (of vowel, consonant, accent, length), reduplication (of the whole stem or part), and accent. Every language combines some of these to make its words.

3. “The farmer kills the duckling” — four layers of meaning

the farmer kills the duckling material content I basic concepts farm, kill, duck II derivational -er ("one who"), -ling ("little") relation III concrete relational number (-s) IV pure relational the (reference), word order drop "the" and the sentence breaks; drop "-s" and it turns into a command; change the order and you get a question, or subject and object swap. I and IV are essential to every language. II and III are optional.
The heart of chapter 5: split a sentence's meaning into material (basic, derivational) and relation (concrete relational, pure relational). Diagram: L/LAB

Sapir dissects “the farmer kills the duckling” exhaustively. Drop the and the sentence collapses; drop -s and it becomes a command (an address); swap farmer and duckling and subject and object reverse — so relation is carried by word order and small words.

From this he sorts concepts into four:

Every language has I and IV. II and III are optional and vary enormously. English marks number and tense (twice — on the noun and the verb) because it treats them as relational, not because it must.

4. Parts of speech are not an analysis of reality

the quality "red" it is redadjective it reddensverb the-table its-rednessnoun (e.g. Chinook) If "it reddens" is a verb, a language may just as well make "red" a verb.
The same quality can be an adjective, a verb or a noun, language by language. A part of speech is not a picture of reality but a way of shaping it. Diagram: L/LAB

Late in chapter 5: if “it reddens” is a verb, a language may make “red” a verb too. Some languages have no adjective and express “red” only as the participle of a verb (“being red”); others nominalise it (“the table of bigness”). English speakers already treat a quality as a thing in “the height of a building.”

The “part of speech” reflects not so much our intuitive analysis of reality as our ability to compose that reality into a variety of formal patterns. (ch. 5)

The one near-universal distinction is noun vs. verb — because “speech consists of a series of propositions”: you need a noun to talk about something and a verb to say something of it. “No logical scheme of the parts of speech … is of the slightest interest to the linguist.”

5. Languages have no ladder of rank

✗ one ladder (the evolutionary ranking) isolating agglutinative inflective (= the peak?) ○ several independent axes · which concepts are expressed (which of I–IV) · technique (isolating / agglutinative / fusional / symbolic) · degree of synthesis (analytic / synthetic / polysynthetic)
Chapter 6: drop the single rank order from "isolating" to "inflective"; describe a language on several independent axes. Diagram: L/LAB

In chapter 6 Sapir discards the old “isolating → agglutinative → inflective” (plus polysynthetic) ranking. It comes from an evolutionary prejudice and from the Eurocentric habit of treating Latin and Greek as the summit.

A linguist that insists on talking about the Latin type of morphology as though it were necessarily the high-water mark of linguistic development is like the zoologist that sees in the organic world a huge conspiracy to evolve the race-horse or the Jersey cow. (ch. 6)

Language “in its fundamental forms is the symbolic expression of human intuitions,” and these “may shape themselves in a hundred ways, regardless of the material advancement or backwardness of the people that handle the forms.” Hence: “Every language is a form language.” To classify at all, you need several independent axes: which concepts a language expresses, its technique (isolating / agglutinative / fusional / internal-change), and its degree of synthesis (analytic / synthetic / polysynthetic).

In sum

Sapir’s claim (ch. 4–6)In a line
Method and function are not one-to-one“Pattern is one thing, its utilization another”
A word is built by about six methodsword order, composition, affixation, internal change, reduplication, accent
A sentence’s meaning has four layersonly I (basic) and IV (pure relational) are essential
Parts of speech shape reality; they don’t picture itonly noun vs. verb is near-universal
Languages have no ladder of ranknot “a conspiracy to evolve the Jersey cow”; use several independent axes

And, from chapter 2: “All grammars leak.” No language is perfectly regular.


Next: the book’s most influential idea — drift (chapters 7–8). For the overview, see “Reading Edward Sapir’s Language”.