1620s, "cavalry soldier," from French dragon, probably so called for the guns they carried, from dragon "carbine, musket," because the guns "breathed fire" like dragons (see dragon). Also see -oon.
dragoon (v.)
"to compel by repeated threats or harassment," 1680s, literally "to force by the agency of dragoons" (which were used by the French kings to persecute Protestants), from dragoon (n.). Related: Dragooned; dragooning.
draggle
dragnet
dragoman
dragon
dragonfly
dragoon
dragster
drain
drainage
drake
dram