One of the mysteries of the English language finally explained.
Any of various Latin American and Californian trees having hard, heavy wood used for construction, shipbuilding, etc.; especially (a) the valley oak of California, Quercus lobata; (b) the Central and South American timber tree Platymiscium pinnatum (family Fabaceae); (c) a West Indian species of catalpa, C. longissima (now rare); (d) (more fully "roble beech") a species of southern beech, Nothofagus obliqua.
Early 19th century. From Spanish roble oak, subsequently applied to various Latin American and Californian trees having hard, heavy wood from classical Latin rōbor-, rōbur oak tree.
In this article we explore how to impress employers with a spot-on CV.