(fe) ban leli watu

(jm p)
 

at some point in the past , once upon a time

Etymology:

fe, ban, le + -li, watu
fe
(p)  at (time), at (unspecified place), in (time), for (for the first time, etc.), of (relating to, number, quantity, amount)
ban
(d)  some, certain
le
(par)  past tense marker
-li
(t xfik)  relating to, of
watu
(b)  time