"Youngthly" is a word in ENGLISH

Pertaining to, or resembling, an abyss; bottomless; unending; profound.

Of, pertaining to, or resembling, the family of plants of which the acanthus is the type.

Of, pertaining to, or resembling, the plant acanthus.

Pertaining to, or resembling, the acephalocysts.

Of or pertaining to Adam, or resembling him.

Pertaining to, or containing, albumen; having the properties of, or resembling, albumen or albumin.

Pertaining to, resembling, or containing, alkali.

Of, pertaining to, or resembling, alveoli or little cells, sacs, or sockets.

Of, pertaining to, or resembling, the family of plants of which the amaranth is the type.

Of, pertaining to, or resembling, an order of plants differing from the lily family chiefly in having the ovary below …

Pertaining to or resembling an Amazon; of masculine manners; warlike.

Of, pertaining to, exhibited in, or resembling, an amphitheater.

Pertaining to, or resembling, an amphora.

Pertaining to, resembling, or made of, almonds.

Of, pertaining to, or resembling, almonds.

Of, pertaining to, or resembling, a snake or serpent.

Of, pertaining to, or resembling, animalcules.

Pertaining to, or resembling, a goose, or the skin of a goose.

Of, pertaining to, or resembling, Apollo.

Pertaining to, or resembling, a decoction.