anxious
Anxiety is a feeling of tightness — and the word says so. Anxious is from Latin anxius, "troubled in mind," built on the verb angere, "to choke, to throttle, to press tight," and ultimately on a PIE root *h₂enǵʰ- that means "to constrict, to make narrow." The emotion is named, at the root, by what the body does under it: the throat closes, the chest tightens, the space available shrinks. The same root surfaces in anguish (Latin angustia, "narrowness"), in angina (a strangling), in angst, and — across the Germanic branch — in the German eng, which simply means "narrow," and in English anger, which began not as rage but as distress, a being-pressed. Before anxiety was a state of mind it was a width: the narrow place, felt from inside.
Anxiety is, at the root, a narrowness. The word is Latin anxius, from angere, "to choke, to press tight," from a PIE root *h₂enǵʰ- whose plain meaning is "to constrict, to make narrow." Every layer of the word is spatial before it is emotional: the throat that closes, the chest that tightens, the room that seems to shrink. We still describe the feeling in exactly these terms — tight with worry, choked up, hemmed in, pressure — without noticing that the abstract noun we use for the state, anxiety, is built from the same picture. The metaphor is not decorative; it is the etymology. The feeling was named by the width it leaves you.
The family makes the narrowness explicit. Anguish is Latin angustia, "tightness, straitness" — the literal narrowness, carried more transparently than in anxious itself. Angina is "a strangling." Angst, borrowed from German in the twentieth century, sits on a suffixed form of the same root, the close structural twin of Latin angustus, "narrow." And the German word eng, the everyday adjective for "narrow, tight," is the same root worn down to bare width — the emotion stripped back to the dimension underneath it. Reach far enough down the family and you find Sanskrit aṃhú-, "narrow," with the sibilant that the satem languages put where Latin kept a hard consonant — the same constriction, named in India and in Rome, three thousand years apart.
One member of the family looks like a stranger and is not: anger. It did not start as rage. It came into English from Old Norse angr, "grief, sorrow, affliction," from the same *h₂enǵʰ- root — and its first English sense was "distress, trouble," a being-pressed, not a striking-out. The hostile, hot sense came later. So anger and anxiety are siblings, both descended from the narrow place, and they diverged the way a pressure can: inward into dread, or outward into heat. The body in a strait can do either. The root does not specify which; it specifies only that something has closed in.
The false friends are the seduction here, because the language is full of ang- words that have nothing to do with constriction. Angle, anchor, England itself — these are the "bend, hook" root, *h₂enk-: a corner is a bend, an anchor is a hook, the Angles were named for the fish-hook shape of their peninsula. Different root, different idea — bending, not tightening. Annex carries a "binding, tying" sense that rhymes with angere's "press together," but it is nectere, "to knot," a separate word. And the most elegant trap of all: anguilla, the eel, and anguis, the snake, share the exact angu- string of anguish and angustus — but they belong to the "snake/eel" root, *h₂engʷʰi-, not the "constrict" root. A perfect surface match, and no kinship at all. The eel is not anxious; it only spells that way.
- anguish — Latin angustia, "tightness, narrowness; distress," from angere; the literal narrowness, even more transparent here than in anxious — the strait, felt as suffering
- anger — Old Norse angr, "grief, sorrow, affliction," from the same root; it entered English meaning "distress," not rage — the inward branch of the narrow place, before it turned hot
- angina — Latin angina, "a strangling" (Greek ankhonē, reinforced by angere); the chest-tightness named, medically, by the choke it is
- angst — German Angst, from Old High German angust, on a suffixed form of the root; the close twin of Latin angustus, "narrow" — dread, with the width still in it
- eng — German, "narrow, tight," from PIE *h₂énǵʰus; the root worn down to bare dimension — the same word as the emotion, with the feeling subtracted
- angustus / "anguished" — Latin angustus, "narrow, close"; the adjective beside the verb, the direct measure of the strait
- hangnail — Old English angnægl — ang- ("painful, tight") + nægl; the "hang-" is a later folk-etymological reshaping of the "painful" root. A small sore named for the tightness, not the hanging
- aṃhú- (Sanskrit) — "narrow"; the satem cousin, its sibilant marking the palatal *ǵʰ that Latin kept hard. The same narrowness, reconstructed across the family
- angle / anchor / England — different root — PIE *h₂enk-, "to bend, hook." A corner is a bend, an anchor a hook, the Angles named for a hook-shaped coast. "Bend," not "tighten" — a different idea entirely
- annex — different root — Latin annectere, "to bind to," from nectere, "to knot, tie" (PIE *ned-); its "binding" sense rhymes with angere's "press together," but it is the knot-root, not the choke-root
- anguilla (eel) / anguis (snake) — different root — anguis, "snake," is from the PIE serpent root *h₂éngʷʰis; anguilla, "eel," is a related, separately-formed word in the same serpent family. Both belong to the snake-and-eel root, not the "constrict" root *h₂enǵʰ- — yet they share the exact angu- of anguish and angustus. The textbook elegant false friend