un senile


[see-nahyl, -nil, sen-ahyl]
showing a decline or deterioration of physical strength or mental functioning, especially short-term memory and alertness, as a result of old age or disease.
of or belonging to old age or aged persons; gerontological; geriatric.
Physical Geography. (of topographical features) having been reduced by erosion to a featureless plain that stands everywhere at base level. Compare peneplain.
a senile person.

1655–65; < Latin senīlis old, equivalent to sen(ex) old man (akin to senior) + -īlis -ile

unsenile, adjective
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
senile (ˈsiːnaɪl)
1.  of, relating to, or characteristic of old age
2.  mentally or physically weak or infirm on account of old age
3.  See old (of land forms or rivers) at an advanced stage in the cycle of erosion
[C17: from Latin senīlis, from senex an old man]

Collins English Dictionary - Complete & Unabridged 10th Edition
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Word Origin & History

1661, "suited to old age," from Fr. sénile, from L. senilis "of old age," from senex (gen. senis) "old, old man," from PIE base *sen- "old" (cf. Skt. sanah "old;" Avestan hana- "old;" O.Pers. hanata- "old age, lapse of time;" Armenian hin "old;" Gk. enos "old, of last year;" Lith. senas "old,"
senis "an old man;" Goth. sineigs "old" (used only of persons), sinistra "elder, senior;" O.N. sina "dry standing grass from the previous year;" O.Ir. sen, O.Welsh hen "old"). Meaning "weak or infirm from age" is first attested 1848.
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

senile se·nile (sē'nīl', sěn'īl')

  1. Relating to, characteristic of, or resulting from old age.

  2. Exhibiting the symptoms of senility, as impaired memory or the inability to perform certain mental tasks.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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