Wiktionary
youthening
vb. (present participle of youthen English)
Usage examples of "youthening".
She was large, formidable, and matronly at this stage of her youthening, and poor Orris seemed a collection of sticks beside her.
Perhaps even trace youthening would confuse it, so it would leave us alone.
I tried to call out something to him, but my youthening prevented me from making much sense, even to myself.