billet
v.
1590s, "to assign quarters to," earlier, as a noun, "official record or register" (Middle English), from Anglo-French billette "list, schedule," diminutive of bille (see bill, n.1) with -let. Related: Billeted; billeting.
n.
1
thick stick of wood, mid-15c., from Middle French billette, diminutive of bille "stick of wood" (see billiards).
2
"document, note;" see billet-doux.