approach    kwēgera, kurēnguka
(a lesson) gutangura
En-En dictionary 
gutangura (-tanguye)     v    1. to begin to, to start to, 2. to approach (a lesson)
kurēnguka (-rēngutse)     v    1. to approach, come into sight, 2. to introduce oneself, 3. to answer to a superior when called, to come running
kwēgera (-ēgereye)     v    1. to approach, to draw near, 2. to draw close
kwegereza (-egereje)     v    1. to cause to approach, 2. put within reach
umugigimo (imi-)     2  class 2
singular: umu-
plural: imi-
  
noise of earthquake, approaching storm
noise    urwamo
(loud, frightening) umuturagaro
(esp. of battle or strife) umuvurungano
(of earthquake, or approaching storm) umugigimo
(of rain, thunder) umuhīndo
(of wind, rain, running feet, etc.) igihīnda
(to make a big) kwāsana, kubomborana, kubugiriza, gusāma
(to make a lot) kuvurungana, kuyogora
(to make a loud frightening) guturagara
En-En dictionary 
rumble    (of earthquake, or approaching storm) umugigimo
(in stomach) kuborōga, kugonga
(thunder) guhīnda
En-En dictionary 
storm    (wind and rain) inkūbi
(wind) inkūrūma
(noise of approaching) umugigimo
(thunderstorm) ikivura
En-En dictionary 
 approach found in: Kirundi II (Grammar)
chapter 44   –heza for “then”