Lengthen and shorten are the workhorse antonyms of length: to lengthen is to become or make longer, to shorten is to become or make shorter — in space or in time. The days lengthen toward June and shorten toward December; a tailor does both for a living. Neither carries judgement or drama; they are the plain pair the fancier length verbs are measured against.
Both are -en verbs — a base word plus the quiet suffix that means 'make or become': length-en, short-en, siblings of widen, deepen, strengthen. That family membership is the pair's character: no tool implied, no verdict passed, equally happy with objects (shorten a speech) and without (the queue lengthened). The drama, where wanted, is bought elsewhere — truncate cuts short abruptly, curtail cuts below what was due, prolong stretches time deliberately; those have their own nuances and pages. This page is the neutral axis they all deviate from.
lengthen
To lengthen is simply to become longer, or to make something so — the plainest verb on the axis of growing length. Days lengthen after midwinter, shadows lengthen through an afternoon, a queue lengthens, a tailor lengthens a sleeve. It belongs to the quiet English family of -en verbs (widen, deepen, strengthen) built straight onto a noun; the Middle English verb was simply 'length'. Where extend adds deliberate reach, lengthen most often just happens, gradually, as time passes.
shorten
To shorten is the plain workhorse of making short: you shorten a rope, a speech, a journey, a name — and things shorten by themselves, as shadows do toward noon and days do toward winter. It asks for no tool and implies no judgement; where curtail cuts a thing below what it was owed and abridge trims a text to its essentials, shorten just reduces length — any length, in space or in time. It is the everyday verb the fancier ones are measured against.
| lengthen | shorten | |
|---|---|---|
| Meaning | become or make longer | become or make shorter |
| Built from | length + -en | short + -en |
| Both ways | lengthen a sleeve; days lengthen | shorten a speech; days shorten |
| Time uses | waiting times lengthen | shorten the journey; a shortened form |
| Fancier kin | elongate, extend, prolong | truncate, curtail, abridge |
| Odd extras | lengthy = too long (mildly negative) | shorten the odds = make more likely |
One tree, two halves of the day. Morning: the sun climbs and the shadow shortens, hauling itself back to a stub at the trunk. Afternoon: the sun slides down and the shadow lengthens, paying out across the field inch by kept inch. Nothing else changed — same tree, same field — which is the pair's whole nature: pure change of length, no drama, either direction. Sleeves, speeches, waits, and daylight all ride the same axis.
lengthen
- iThey lengthened the pier to take the larger ferries.
- iiVowels lengthen noticeably in the southern dialect.
- iiiThe silences between his letters lengthened year by year.
shorten
- iThe editor shortened the piece by a third without losing a fact.
- iiEveryone's name got shortened within a week of term starting.
- iiiThe bypass shortens the journey by twenty minutes.
Both run transitive and intransitive with no fuss, which is why they anchor trend prose: waiting lists lengthen, days shorten. Choose the plain pair unless nuance earns its keep — truncate, curtail, abridge, and prolong each carry a marked meaning, and truncate's page against shorten is on this site. One cheerful oddity: to shorten the odds is to make an outcome more likely — bookmakers' English that surfaces in listening.
The pair's exam value is trend language without ornament: waiting times lengthened, the days shorten from September — intransitive, neutral, safe. Reserve the marked verbs for marked meanings (truncated, curtailed, prolonged), and bank one idiom: shorten the odds means to make an outcome more likely — the opposite of what most learners guess.