Robust
1540s, from Middle French robuste (14c.) and directly from Latin robustus "strong and hardy," literally "as strong as oak," originally "oaken," from robur, robus "hard timber, strength," also "a special kind of oak," named for its reddish heartwood, from Latin ruber "red" (related to robigo "rust"), from PIE root [reudh-](eudic-https://cn.eudic.net/dict/searchword?word=reudh-#ID2066074281) "red, ruddy." Related: Robustly; robustness. Robustious (1540s) was a common form in 17c. (see "Hamlet" iii.2); it fell from use by mid-18c., but was somewhat revived by mid-19c. antiquarian writers.
古代罗马人发现一种颜色发红的橡木质地特别坚硬，因此广泛使用这种橡木作为建筑材料。这种橡木在上面的英文引文中写作 robur 或 robus，来自 ruber（red，红色）。
形容词 robustus 原意是“橡木制的”，由橡木的坚硬引申出“坚硬、强壮，像橡树一样”的意思。
Robust 源于 robustus 。
——收入 词语的化石层