senile

C2+ Topic:Describing Qualities

US /ˈsinaɪl/ UK /ˈsiːnaɪl/ See IPA manual

Meanings

1

adj
showing the mental decline associated with old age

In his senile years he could no longer recognize old friends.

Thesaurus

Synonyms

1 adj · showing the mental decline... dodderingdecrepit aged failingdoting

Opposites

youthful lucid sharp

Word family

Forms senility

Derived forms senility

Related forms senilitysenate seniorsenescence

Simplified etymology

Senile entered English in the mid-17th century and derives from Latin senex, meaning “old” or “old man.” It is related to senior, senate, sire, and sir.

Etymology

From Latin 'senilis' ('of an old man'), from 'senex' ('old man, old'), from Proto-Indo-European *sen- ('old').

senilis Latin senex Latin *sen- Proto-Indo-European

View etymology graph ->

Topics

Describing Qualities

External links

# senile

**Type:** Word
**Level:** C2+
**Part of speech:** adj
**IPA (US):** /ˈsinaɪl/
**IPA (UK):** /ˈsiːnaɪl/

## Meanings
1. showing the mental decline associated with old age

## Examples
- In his senile years he could no longer recognize old friends.

## Synonyms
- doddering
- decrepit
- aged
- failing
- doting

## Antonyms
- youthful
- lucid
- sharp

## Derived Forms
- senility

## Related Forms
- senility
- senate
- senior
- senescence

## Roots and Affixes
- Root: senilis
- Root: senex
- Root: *sen-

## Etymology
From Latin 'senilis' ('of an old man'), from 'senex' ('old man, old'), from Proto-Indo-European *sen- ('old').

## AI Etymology
Senile comes from Latin 'senilis' ('of an old man'), from 'senex' ('old man, old'), from Proto-Indo-European *sen- ('old'). The historical chain includes Latin senilis, Latin senex, and Proto-Indo-European *sen-. Older glosses in the chain include "senilis", "of an old man", "senex", and "old man, old", which help explain the semantic range of the modern word. Morphologically, senile is best read as borrowing, yielding an English adjective shaped by both form history and later usage. In current English it functions as an adjective, with the sense "showing the mental decline associated with old age". English derivatives include senility; related forms include senility, senate, senior, and senescence. The result is an English adjective whose etymology preserves the older forms while supporting the word's specialized modern meaning.

## Topics
- Describing Qualities

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