catechumen (n.)youdaoicibaDictYouDict
"new convert," 15c., from French catéchumène, from Church Latin catechumenus, from Greek katekhoumenos "one being instructed," passive present participle of katekhein (see catechesis).
du jour (adj.)youdaoicibaDictYouDict
from French plat du jour "dish of the day," early 20c. on restaurant menus, abstracted as an all-purpose modifier 1989.
toolbar (n.)youdaoicibaDictYouDict
1960 as a frame fitted to a tractor to hold tools; from tool (n.) + bar (n.1). Computer sense is attested from 1991.
Among 100-odd new features in Excel 3.0 is a row of "buttons" on the screen called the Toolbar. Located under the pull-down menus, the Toolbar provides rapid access to frequently used commands. ["Popular Science," April 1991.]