A-frameyoudaoicibaDictYouDict
type of framework shaped like the letter "A," 1909; as a type of building construction from 1932.
bee (n.)youdaoicibaDictYouDict
stinging insect, Old English beo "bee," from Proto-Germanic *bion (cognates: Old Norse by, Old High German bia, Middle Dutch bie), possibly from PIE root *bhi- "quiver." Used metaphorically for "busy worker" since 1530s.

Sense of "meeting of neighbors to unite their labor for the benefit of one of their number," 1769, American English, probably is from comparison to the social activity of the insect; this was extended to other senses (such as spelling bee, first attested 1809; Raising-bee (1814) for building construction; also hanging bee "a lynching"). To have a bee in (one's) bonnet (1825), said of one who is harebrained or has an intense new notion or fancy, is said in Jamieson to be Scottish, perhaps from earlier expressions such as head full of bees (1510s), denoting mad mental activity.
plaster (n.)youdaoicibaDictYouDict
late Old English plaster "medicinal application," from Vulgar Latin plastrum, shortened from Latin emplastrum "a plaster" (in the medical as well as the building sense), from Greek emplastron "salve, plaster" (used by Galen instead of more usual emplaston), noun use of neuter of emplastos "daubed on," from en- "on" + plastos "molded," from plassein "to mold" (see plasma). The building construction material is first recorded in English c. 1300, via Old French plastre, from the same source, and in early use the English word often had the French spelling.