lokole,
pl. balokole (class 1a/2 : - / ba-)
lokolé,
pl. nkole (class 11/10n : lo- / n- : in front of t,k,g,s)
musical / communication instrument (slit drum)
hollow tree trunk with a slit on which they hit
to report an event to neighbouring villages under a form of code.
A bit like morsecode, but existing since longtime before.