• (America) IPA: /ˈdoʊtɪdʒ/
• (RP) IPA: /ˈdəʊtɪdʒ/

dotage

1. Decline in judgment and other cognitive functions, associated with aging; senility.
2. Fondness or attentiveness, especially to an excessive degree.
   • 1598–1599 (first performance)​, William Shakespeare, “Much Adoe about Nothing”, in Mr. William Shakespeares Comedies, Histories, & Tragedies: Published According to the True Originall Copies (First Folio), London: Printed by Isaac Iaggard, and Ed[ward] Blount, published 1623, OCLC 606515358 ↗, [Act II, scene iii], page 108 ↗, column 2:

     Claudio. And ſhe is exceeding wiſe.

     Prince. In euery thing, but in louing Benedicke. […] I would ſhee had beſtowed this dotage on mee,

3. Foolish utterance(s); drivel.
   • 1642, John Milton, An Apology for Smectymnuus, London; reprinted in A Complete Collection of the Hiſtorical, Political, and Miſcellaneous Works of John Milton, […] , volume I, Amsterdam, 1698, page 193 ↗:

     the ſapleſs dotages of old Paris and Salamanca.

• (loss of mental acuity associated with aging) second childhood

• French: débilité sénile, sénilité
• German: Senilität, Altersschwäche
• Russian: старческий
• Spanish: senilidad