valetudinary
Sickly, infirm, valetudinarian.
obsolete
"His Majesty began to become valetudinary; and the hypochondria which tormented him rendered his humor very melancholy.
Where it comes from
From Latin valētūdin- + -ary, from oblique stem of Latin valētūdō, from valeō + -tūdō. By surface analysis, valetude + -arian. Doublet of valetudinarious.
Related words
Adapted from the Wiktionary entry valetudinary (CC BY-SA 4.0).