en

¹ American  

[en] / ɛn /

noun

1. the letter N, n.

2. Also called nut.  Printing. half of the width of an em.

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adjective

1. Printing. having the area of an en quad or the length of an en.

   en quad; en dash.

EN ² American  

abbreviation

Biology, Ecology.

1. endangered.

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en- ³ American  

1. a prefix occurring originally in loanwords from French and productive in English on this model, forming verbs with the general sense “to cause (a person or thing) to be in” the place, condition, or state named by the stem; more specifically, “to confine in or place on” (enshrine; enthrone; entomb ); “to cause to be in” (enslave; entrust; enrich; encourage; endear ); “to restrict” in the manner named by the stem, typically with the additional sense “on all sides, completely” (enwind; encircle; enclose; entwine ). This prefix is also attached to verbs in order to make them transitive, or to give them a transitive marker if they are already transitive (enkindle; enliven; enshield; enface ).

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en- ⁴ American  

1. a prefix meaning “within, in,” occurring in loanwords from Greek.

   energy; enthusiasm.

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-en ⁵ American  

1. a suffix formerly used to form transitive and intransitive verbs from adjectives (fasten; harden; sweeten ), or from nouns (heighten; lengthen; strengthen ).

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-en ⁶ American  

1. a suffix used to form adjectives of source or material from nouns.

   ashen; golden; oaken.

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-en ⁷ American  

1. a suffix used to mark the past participle in many strong and some weak verbs.

   taken; proven.

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-en ⁸ American  

1. a suffix used in forming the plural of some nouns.

   brethren; children; oxen.

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-en ⁹ American  

1. a diminutive suffix.

   kitten; maiden.

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en- ¹ British  

prefix

1. (from nouns)

   1. put in or on

      entomb

      enthrone

   2. go on or into

      enplane

   3. surround or cover with

      enmesh

   4. furnish with

      empower

2. (from adjectives and nouns) cause to be in a certain condition

   enable

   encourage

   enrich

   enslave

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EN ² British  

abbreviation

1. enrolled nurse

2. English Nature

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-en ³ British  

suffix

1. cause to be; become; cause to have

   blacken

   heighten

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-en ⁴ British  

suffix

1. of; made of; resembling

   ashen

   earthen

   wooden

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en- ⁵ British  

prefix

1. in; into; inside

   endemic

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en ⁶ British  

/ ɛn /

noun

1. Also called: nut.  printing a unit of measurement, half the width of an em See also ennage

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Etymology

Origin of en¹

First recorded in 1785–95

Origin of en-³

Middle English < Old French < Latin in- in- ²

Origin of en-⁴

From Greek (often through Latin ); cognate with in- ¹, in- ²

Origin of -en⁵

Middle English, Old English -n- (as in Middle English fastnen, Old English fǣstnian “to make fast, fasten”); cognate with -n- of like verbs in other Germanic languages ( Old Norse fastna )

Origin of -en⁶

Middle English, Old English; cognate with Old High German -īn, Gothic -eins, Latin -īnus; -ine ¹

Origin of -en⁷

Middle English, Old English; cognate with German -en, Old Norse -inn

Origin of -en⁸

Middle English; Old English -an, case ending of n-stem nouns, as in naman oblique singular, and nominative and accusative plural of nama “name”; akin to n-stem forms in other Indo-European languages, as in Latin nōmen, nōmin- “name”

Origin of -en⁹

Middle English, Old English, from neuter of -en ²

Example Sentences

Elected officials, labor unions and other groups that had endorsed Swalwell abandoned him en masse after the allegations against him were publicized.

From Los Angeles Times • Apr. 13, 2026

The Nasdaq Composite got a boost from an old friend en route to its ninth-consecutive gain.

From Barron's • Apr. 13, 2026

All four players struggled with their serves in a topsy-turvy second set, with four consecutive breaks en route to 3-3.

From BBC • Apr. 11, 2026

The plane, which was en route to the island, crashed on landing around 12:20 p.m. in Avalon in a rugged, not easily accessible area, prompting an emergency response from the Los Angeles County Fire Department.

From Los Angeles Times • Apr. 9, 2026

She had been dreaming that she was on a train, en route to her first job interview.

From "The Long-Lost Home" by Maryrose Wood