Word Origin & History
robust1549, from L. robustus "strong and hardy," originally "oaken," from robur, robus "hard timber, strength," also "a special kind of oak," named for its reddish heartwood, from L. ruber "red" (cf. robigo "rust"). Robustious (1548) was a common form in 17c. (cf. "Hamlet" iii.2); it fell from use by mid-18c.,
EXPANDbut was somewhat revived by mid-19c. antiquarian writers.
COLLAPSE