rusk
noun
ˈrəsk 
1
: hard crisp bread originally used as ship's stores
2
: a sweet or plain bread baked, sliced, and baked again until dry and crisp
Example Sentences
Recent Examples on the Web Biscuits went by unappetizing names such as hardtack, rusks and ship’s biscuits, their durability their main asset. 
Washington Post, 19 Mar. 2020 Toss with about ½ cup of vinaigrette, making sure to combine thoroughly so the rusks begin to soak up the vinaigrette. Sarah Fritsche, SFChronicle.com, 3 July 2018
Washington Post, 19 Mar. 2020 Toss with about ½ cup of vinaigrette, making sure to combine thoroughly so the rusks begin to soak up the vinaigrette. Sarah Fritsche, SFChronicle.com, 3 July 2018 Word History
Etymology
modification of Spanish & Portuguese rosca coil, twisted roll
First Known Use
1589, in the meaning defined at sense 1
Biographical Definition
Rusk
biographical name
ˈrəsk
(David) Dean 1909–1994 U.S. Secretary of State (1961–69)