elden

From eld +‎ -en. Compare Middle English elden, ealdien (“to age, grow older”). More at eld.

elden (third-person singular simple present eldens, present participle eldening, simple past and past participle eldened)

1. (archaic, intransitive) to advance in eld or old age; to grow older; to age
   • 1955, Beloved Lady, page 49:

     Margery looked up at him, colouring, startled, suspicious. "Truth, Lady, you've no call to look at me thus," Hugh said, smiling. "I'm eldening now, like my late master, God cherish him, but I'm not so old I can't remember what it is to burn, […]

• leden, neeld

elden

1. definite singular of eld