Webster’s Revised Unabridged Dictionary · 1913
Robustious
Ro·bus′tious (rō·bŭs′chŭs; 106), a. [Cf. L. robusteus of oak.] Robust. [Obs. or Humorous] W. Irving.
In Scotland they had handled the bishops in a more robustious manner. Milton.
— Ro·bus′tious·ly, adv. — Ro·bus′tious·ness, n.