1. Foolishly obstinate or resolute; stubborn; unrelenting; unfeeling; stern. This sturdy marquis gan his hearte dress To rue upon her wifely steadfastness. (Chaucer) This must be done, and I would fain see mortal so sturdy as to gainsay. (Hudibras) A sturdy, hardened sinner shall advance to the utmost pitch of impiety with less reluctance than he took the first steps. (Atterbury)
Origin: OE. Sturdi inconsiderable, OF. Estourdi stunned, giddy, thoughtless, rash, F. Etourdi, p.p. Of OF. Estourdir to stun, to render giddy, to amaze, F. Etourdir; of uncertain origin. The sense has probably been influenced by E. Stout.
Origin: OF. Estourdi giddiness, stupefaction] A disease in sheep and cattle, marked by great nervousness, or by dullness and stupor.