Linguistics & Language Structure

Phoneme

the smallest unit of sound in a language that can distinguish one word from another (e.g., the /k/ sound in cat).

Grapheme

The smallest meaningful contrastive unit in a writing system; the written representation of a phoneme (letters or letter combinations like sh, t, ea).

Morpheme

The smallest unit of meaning in a language. It cannot be divided into smaller meaningful parts (e.g., un- and break in unbreakable).

Allophone

A phonetic variant of a single phoneme that does not change the word's meaning (e.g., the aspirated /p/ in pin vs. the unaspirated /p/ in spin).

Cognates

Words in two different languages that share a common etymological origin, meaning, and often spelling (e.g., excellent in English and excelente in Spanish).

False Cognates (False Friends):

Words in two languages that look or sound similar but have entirely different meanings (e.g., the Spanish embarazada means pregnant, not embarrassed).

Idiom

An expression whose meaning cannot be understood from the literal definitions of its constituent words (e.g., "bite the bullet").

Pragmatics

The study of how context contributes to meaning in language use; understanding social norms, politeness, and unspoken implications.

Register

The variety of language used a specific social setting or context, ranging from highly formal (academic presentations) to informal (slang with friends).

Minimal Pair

Two words that differ by only one sound (e.g., ship and sheep), used to practice sound discrimination.

Voicing

Whether the vocal cords vibrate (voiced: /z/, /v/) or do not vibrate (voiceless: /s/, /f/) when producing a sound.

Place of Articulation

Where a sound is formed in the mouth (e.g., bilabial, labiodental, alveolar, velar).

Manner of Articulation

How the airflow is obstructed to make a sound (e.g., stops, fricatives, affricates, nasals).

Prosody

The rhythm, cadence, intonation, and stress patterns of spoken language.

Free Morpheme

A morpheme that can stand alone as a word (e.g., book, walk).

Bound Morpheme

A morpheme that must be attached to another to have meaning (e.g., prefixes like un-, suffixes like -est).

Inflectional Morpheme

A suffix that changes the grammatical function (tense, plurality) but not the core meaning or part of speech (e.g., walk $\rightarrow$ walked).

Derivational Morpheme

An affix that changes the part of speech or core meaning of a word (e.g., bake (verb) $\rightarrow$ baker (noun)).

Syntax

The rules governing word order and sentence structure.

Semantics

The study of literal meaning in words, phrases, and sentences.

Dialect

A regional or social variety of a language distinguished by vocabulary, grammar, and pronunciation.

Sociolect

A variety of language associated with a specific social class or group.

Code-Switching

Alternating between two or more languages or language varieties within a single conversation.

Diglossia

A situation where two distinct varieties of a language are used by the same community in different social situations (e.g., High Arabic for formal writing, Low Arabic for daily speech).