gavel (n.) Look up gavel at Dictionary.com
"small mallet used by presiding officers at meetings," 1805, American English, of unknown origin; perhaps connected with German dialectal gaffel "brotherhood, friendly society," from Middle High German gaffel "society, guild," related to Old English gafol "tribute," giefan "to give" (see habit). But in some sources gavel also is identified as a type of mason's tool, in which case the extended meaning may be via freemasonry. As a verb, by 1887, from the noun. Old English had tabule "wooden hammer struck as a signal for assembly among monks," an extended sense of table (n.).