Language Terms Explained
Every grammar book, dictionary entry and pronunciation guide assumes a vocabulary that nobody ever teaches you directly. These pages teach it. Each term gets a plain-language definition, a precise one, a sourced real-language example or a clearly labelled schematic one, an analysis of what is happening in that example, and an explanation of why the concept matters when you are actually learning a language — followed by how the same concept looks elsewhere in the world, because almost none of these categories work the same way in every language.
Beginner
The words you need before any grammar explanation makes sense: the word classes, the parts of a clause, and the difference between a phrase and a clause. If you can read these comfortably, most beginner grammar books become usable.
A word for a thing, person, place, idea or quality.
DeterminerA noun-phrase item, such as an article or demonstrative, that helps anchor or quantify what the phrase refers to.
VerbA word for an action, event or state — what is happening.
CopulaAn overt grammatical element that supports some clauses with a nonverbal predicate.
AdjectiveA word that describes a noun — its size, colour, quality or state.
AdverbA word that modifies a verb, an adjective, another adverb, or a whole clause — often saying how, when, where or to what degree.
PronounA word that stands in for a noun phrase — 'she', 'it', 'them'.
Preposition and postpositionA small word showing a relationship — in, on, under, after, with. Some languages put it after the noun instead of before.
SubjectThe part of a clause that the verb agrees with — usually who or what performs the action.
ObjectThe part of a clause that the action is done to.
ClauseA unit built around one verb, with its subject and any objects — the building block of a sentence.
TenseGrammatical marking that locates an event in time — past, present or future.
Intermediate
The categories that separate languages from one another — classifier systems, aspect, mood, voice, case, gender and agreement — plus the clause types you need in order to say anything complicated. This is the tier that explains why your target language does things your first language does not.
A verb that supports a main verb, carrying grammatical information rather than the main meaning.
Modal verbA verb expressing possibility, necessity, permission or ability — can, must, should, may.
Transitive and intransitive verbsA transitive verb takes an object; an intransitive one does not.
Direct and indirect objectsThe direct object is what the action affects; the indirect object is usually the recipient.
Subordinate clauseA clause that cannot stand alone — it depends on a main clause.
Relative clauseA clause that modifies a noun — 'the book that I read'.
AspectGrammatical marking of how an event unfolds — whether it is ongoing, completed, repeated or just beginning.
Grammatical moodVerb marking showing whether something is stated as fact, wished for, commanded or hypothetical.
Grammatical voiceWhether the subject is the one doing the action or the one it is done to — active versus passive.
AgreementWhen one word changes form to match another — a verb matching its subject, an adjective matching its noun.
Grammatical caseEndings on nouns showing their role in the sentence — who did it, who it was done to, whose it is.
Grammatical genderA system sorting nouns into classes that other words must agree with.
Classifier (numeral classifier)A grammatical element used in counting constructions to mark a conventional class for the noun being counted.
Word orderThe order in which subject, verb and object normally appear.
Phrase and constituentA group of words that behaves as a single unit inside a sentence.
Prepositional phraseA preposition plus the noun phrase it governs — 'on the table', 'after lunch'.
Modifier and complementA modifier adds optional information; a complement is required to complete the meaning.
Advanced
The analytical vocabulary of linguistics proper: sound and word units, word-building patterns such as reduplication and polysynthesis, argument structure, alignment and typology — followed by the sociolinguistic distinctions among language variety, register, style, honorifics and speech levels. Useful if you read linguistics, work with the IPA, or want to understand how linguistic patterns carry social meaning.
A sound unit that can change one word into another in a given language.
Minimal pairTwo words or signs with different meanings that differ in exactly one sound or sign parameter.
AllophoneOne of the predictable pronunciations of a single phoneme, chosen by its environment.
SyllableA sound unit organised around a central peak, with optional sounds before or after it.
StressExtra prominence given to one syllable relative to nearby syllables.
ToneA language-specific pitch pattern on a syllable or word that can distinguish meaning.
MorphemeThe smallest unit of a language that carries meaning or grammatical function.
AllomorphOne of the different shapes a single morpheme takes depending on its surroundings.
InflectionChanging a word's form to fit its grammar, without making it a new word.
DerivationMaking a new word from an existing one — often changing its word class.
ReduplicationA word-building pattern that copies all or part of a form to express a grammatical or lexical contrast.
CliticA small grammatical form that cannot stand prosodically on its own and leans on a neighbouring word.
PolysynthesisA label for language patterns in which one word—often a verb—can contain many meaningful and grammatical parts.
ValencyHow many participants a verb requires.
Morphosyntactic alignmentHow a language groups the subject of an intransitive verb with either the subject or the object of a transitive one.
ErgativityA case system where the doer of a transitive action gets a special marking that intransitive subjects do not.
EvidentialityGrammatical marking of how the speaker knows what they are saying.
DeixisWords whose meaning depends entirely on who is speaking, where and when — 'I', 'here', 'yesterday'.
Information structureHow a sentence packages what is already known against what is new.
MarkednessThe idea that one member of a grammatical pair is the basic, default one and the other is the special case.
Constituent structureThe hierarchical grouping of words into nested phrases.
DependencyAn analysis of syntax as direct links between words — each word depends on one head.
Linguistic typologyClassifying languages by their structural features rather than their family history.
GrammaticalizationThe process by which ordinary words gradually become grammatical markers.
PragmaticsHow context supplies meaning that the words alone do not carry.
Language varietyA neutral umbrella for a systematic form of language identified by who uses it, where or in what situation.
RegisterA recurring way of using language associated with a situation, purpose, participants or channel.
Style (sociolinguistics)A pattern of linguistic choices through which speakers create or signal social meaning in an interaction.
Honorifics and speech levelsConventional words or grammatical forms that index a social relationship involving the addressee, a referent or another participant.
Put the terminology to work
These terms exist to make the rest of the site readable. Each of these sections uses them constantly.
- Terminology quizMultiple choice over every term here, with explanations.
- Pronunciation guidesWhere phoneme, allophone and minimal pair are used in earnest.
- Notation systemsThe IPA and its relatives — how these distinctions get written down.
- Language guidesCase, aspect, mood and agreement, language pair by language pair.